{"id":521,"date":"2026-09-21T10:24:01","date_gmt":"2026-09-21T10:24:01","guid":{"rendered":"https:\/\/vipulhvacsolution.in\/blog\/?p=521"},"modified":"2026-09-21T11:05:16","modified_gmt":"2026-09-21T11:05:16","slug":"which-gas-is-used-in-a-heat-pump","status":"publish","type":"post","link":"https:\/\/vipulhvacsolution.in\/blog\/which-gas-is-used-in-a-heat-pump\/","title":{"rendered":"Which Gas Is Used in a Heat Pump?"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_88 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/vipulhvacsolution.in\/blog\/which-gas-is-used-in-a-heat-pump\/#Which_Gas_Is_Used_in_a_Heat_Pump_Complete_Refrigerant_Guide\" >Which Gas Is Used in a Heat Pump? Complete Refrigerant Guide<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/vipulhvacsolution.in\/blog\/which-gas-is-used-in-a-heat-pump\/#Quick_Answer_Which_Gas_Is_Used_in_a_Heat_Pump\" >Quick Answer: Which Gas Is Used in a Heat Pump?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/vipulhvacsolution.in\/blog\/which-gas-is-used-in-a-heat-pump\/#What_Is_the_Gas_in_a_Heat_Pump_Called\" >What Is the Gas in a Heat Pump Called?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/vipulhvacsolution.in\/blog\/which-gas-is-used-in-a-heat-pump\/#How_Does_Refrigerant_Work_in_a_Heat_Pump\" >How Does Refrigerant Work in a Heat Pump?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/vipulhvacsolution.in\/blog\/which-gas-is-used-in-a-heat-pump\/#What_Refrigerant_Does_VIPUL_HVAC_Use_in_Heat_Pumps\" >What Refrigerant Does VIPUL HVAC Use in Heat Pumps?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/vipulhvacsolution.in\/blog\/which-gas-is-used-in-a-heat-pump\/#Is_R-32_Used_in_Heat_Pumps\" >Is R-32 Used in Heat Pumps?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/vipulhvacsolution.in\/blog\/which-gas-is-used-in-a-heat-pump\/#Is_R-410A_Used_in_Heat_Pumps\" >Is R-410A Used in Heat Pumps?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/vipulhvacsolution.in\/blog\/which-gas-is-used-in-a-heat-pump\/#Is_R-454B_Used_in_Heat_Pumps\" >Is R-454B Used in Heat Pumps?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/vipulhvacsolution.in\/blog\/which-gas-is-used-in-a-heat-pump\/#Is_R-290_Used_in_Heat_Pumps\" >Is R-290 Used in Heat Pumps?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/vipulhvacsolution.in\/blog\/which-gas-is-used-in-a-heat-pump\/#Is_CO%E2%82%82_Used_in_Heat_Pumps\" >Is CO\u2082 Used in Heat Pumps?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/vipulhvacsolution.in\/blog\/which-gas-is-used-in-a-heat-pump\/#Is_Ammonia_Used_in_Heat_Pumps\" >Is Ammonia Used in Heat Pumps?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/vipulhvacsolution.in\/blog\/which-gas-is-used-in-a-heat-pump\/#What_About_R-134a\" >What About R-134a?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/vipulhvacsolution.in\/blog\/which-gas-is-used-in-a-heat-pump\/#R-32_vs_R-410A_for_Heat_Pumps\" >R-32 vs R-410A for Heat Pumps<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/vipulhvacsolution.in\/blog\/which-gas-is-used-in-a-heat-pump\/#R-410A_vs_R-454B\" >R-410A vs R-454B<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/vipulhvacsolution.in\/blog\/which-gas-is-used-in-a-heat-pump\/#Heat_Pump_Refrigerant_GWP_Comparison\" >Heat Pump Refrigerant GWP Comparison<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/vipulhvacsolution.in\/blog\/which-gas-is-used-in-a-heat-pump\/#Why_Are_Heat_Pump_Refrigerants_Changing\" >Why Are Heat Pump Refrigerants Changing?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/vipulhvacsolution.in\/blog\/which-gas-is-used-in-a-heat-pump\/#Can_You_Change_the_Refrigerant_in_a_Heat_Pump\" >Can You Change the Refrigerant in a Heat Pump?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/vipulhvacsolution.in\/blog\/which-gas-is-used-in-a-heat-pump\/#Can_You_Mix_Two_Refrigerants\" >Can You Mix Two Refrigerants?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/vipulhvacsolution.in\/blog\/which-gas-is-used-in-a-heat-pump\/#How_Do_You_Know_Which_Refrigerant_Your_Heat_Pump_Uses\" >How Do You Know Which Refrigerant Your Heat Pump Uses?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/vipulhvacsolution.in\/blog\/which-gas-is-used-in-a-heat-pump\/#What_Refrigerant_Is_Used_in_Heat_Pump_Water_Heaters\" >What Refrigerant Is Used in Heat Pump Water Heaters?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/vipulhvacsolution.in\/blog\/which-gas-is-used-in-a-heat-pump\/#What_Refrigerant_Is_Best_for_an_Industrial_Heat_Pump\" >What Refrigerant Is Best for an Industrial Heat Pump?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-22\" href=\"https:\/\/vipulhvacsolution.in\/blog\/which-gas-is-used-in-a-heat-pump\/#Heat_Pump_Refrigerant_and_Safety\" >Heat Pump Refrigerant and Safety<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-23\" href=\"https:\/\/vipulhvacsolution.in\/blog\/which-gas-is-used-in-a-heat-pump\/#Why_Refrigerant_Charge_Matters\" >Why Refrigerant Charge Matters<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-24\" href=\"https:\/\/vipulhvacsolution.in\/blog\/which-gas-is-used-in-a-heat-pump\/#Heat_Pump_Refrigerant_Leak_What_Should_You_Do\" >Heat Pump Refrigerant Leak: What Should You Do?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-25\" href=\"https:\/\/vipulhvacsolution.in\/blog\/which-gas-is-used-in-a-heat-pump\/#Does_Refrigerant_Affect_Heat_Pump_Efficiency\" >Does Refrigerant Affect Heat Pump Efficiency?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-26\" href=\"https:\/\/vipulhvacsolution.in\/blog\/which-gas-is-used-in-a-heat-pump\/#Does_R-32_Mean_a_Heat_Pump_Is_More_Efficient\" >Does R-32 Mean a Heat Pump Is More Efficient?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-27\" href=\"https:\/\/vipulhvacsolution.in\/blog\/which-gas-is-used-in-a-heat-pump\/#Why_Choose_VIPUL_HVAC_for_Heat_Pump_Solutions\" >Why Choose VIPUL HVAC for Heat Pump Solutions?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-28\" href=\"https:\/\/vipulhvacsolution.in\/blog\/which-gas-is-used-in-a-heat-pump\/#Frequently_Asked_Questions\" >Frequently Asked Questions<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-29\" href=\"https:\/\/vipulhvacsolution.in\/blog\/which-gas-is-used-in-a-heat-pump\/#Conclusion\" >Conclusion<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"PDq2pG_selectionAnchorContainer\" dir=\"auto\" data-section-id=\"1stcrlk\" data-start=\"0\" data-end=\"62\"><span class=\"ez-toc-section\" id=\"Which_Gas_Is_Used_in_a_Heat_Pump_Complete_Refrigerant_Guide\"><\/span>Which Gas Is Used in a Heat Pump? Complete Refrigerant Guide<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"auto\" data-start=\"64\" data-end=\"271\">If you are asking <strong data-start=\"82\" data-end=\"121\">\u201cWhich gas is used in a heat pump?\u201d<\/strong>, the answer depends on the <strong data-start=\"149\" data-end=\"214\">heat-pump type, application, capacity, manufacturer and model<\/strong>. There is no single refrigerant used in every heat pump.<\/p>\n<p dir=\"auto\" data-start=\"273\" data-end=\"664\">Common refrigerants used in heat-pump systems include <strong data-start=\"327\" data-end=\"408\">R-32, R-410A, R-454B, R-290 (propane), R-134a, R-407C, R-513A and CO\u2082 (R-744)<\/strong>, depending on the equipment and application. The U.S. EPA and European Commission both list multiple refrigerant options for different heat-pump applications, with different efficiency, GWP and safety characteristics.<\/p>\n<p dir=\"auto\" data-start=\"666\" data-end=\"1023\">For <strong data-start=\"670\" data-end=\"717\">residential and light-commercial heat pumps<\/strong>, R-32, R-410A and newer lower-GWP alternatives such as R-454B are among the refrigerants encountered in the market. However, <strong data-start=\"843\" data-end=\"925\">you should never select or add refrigerant based only on the type of heat pump<\/strong>. The correct refrigerant is the one specified on the equipment nameplate and by the manufacturer.<\/p>\n<p dir=\"auto\" data-start=\"1025\" data-end=\"1136\">For commercial and industrial heat-pump projects, refrigerant selection becomes even more application-specific.<\/p>\n<hr data-start=\"1138\" data-end=\"1141\" \/>\n<h2 dir=\"auto\" data-section-id=\"199ltu2\" data-start=\"1143\" data-end=\"1193\"><span class=\"ez-toc-section\" id=\"Quick_Answer_Which_Gas_Is_Used_in_a_Heat_Pump\"><\/span>Quick Answer: Which Gas Is Used in a Heat Pump?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<div class=\"group TyagGW_tableContainer\" dir=\"auto\">\n<div class=\"TyagGW_tableWrapper flex flex-col-reverse w-fit\" tabindex=\"-1\">\n<table class=\"w-fit min-w-(--thread-content-width)\" dir=\"auto\" data-start=\"1195\" data-end=\"2240\">\n<thead data-start=\"1195\" data-end=\"1252\">\n<tr data-start=\"1195\" data-end=\"1252\">\n<th class=\"last:pe-10\" data-start=\"1195\" data-end=\"1209\" data-col-size=\"sm\">Refrigerant<\/th>\n<th class=\"last:pe-10\" data-start=\"1209\" data-end=\"1239\" data-col-size=\"md\">Typical Application\/Context<\/th>\n<th class=\"last:pe-10\" data-start=\"1239\" data-end=\"1252\" data-col-size=\"md\">Key Point<\/th>\n<\/tr>\n<\/thead>\n<tbody data-start=\"1267\" data-end=\"2240\">\n<tr data-start=\"1267\" data-end=\"1376\">\n<td data-start=\"1267\" data-end=\"1278\" data-col-size=\"sm\"><strong data-start=\"1269\" data-end=\"1277\">R-32<\/strong><\/td>\n<td data-start=\"1278\" data-end=\"1329\" data-col-size=\"md\">Residential\/light-commercial HVAC and heat pumps<\/td>\n<td data-col-size=\"md\" data-start=\"1329\" data-end=\"1376\">Lower GWP than R-410A; A2L mildly flammable<\/td>\n<\/tr>\n<tr data-start=\"1377\" data-end=\"1492\">\n<td data-start=\"1377\" data-end=\"1390\" data-col-size=\"sm\"><strong data-start=\"1379\" data-end=\"1389\">R-410A<\/strong><\/td>\n<td data-col-size=\"md\" data-start=\"1390\" data-end=\"1456\">Existing\/legacy residential &amp; commercial AC\/heat-pump equipment<\/td>\n<td data-col-size=\"md\" data-start=\"1456\" data-end=\"1492\">Zero ODP but relatively high GWP<\/td>\n<\/tr>\n<tr data-start=\"1493\" data-end=\"1594\">\n<td data-start=\"1493\" data-end=\"1506\" data-col-size=\"sm\"><strong data-start=\"1495\" data-end=\"1505\">R-454B<\/strong><\/td>\n<td data-col-size=\"md\" data-start=\"1506\" data-end=\"1555\">Newer HVAC\/heat-pump equipment in some markets<\/td>\n<td data-col-size=\"md\" data-start=\"1555\" data-end=\"1594\">Lower-GWP A2L alternative to R-410A<\/td>\n<\/tr>\n<tr data-start=\"1595\" data-end=\"1701\">\n<td data-start=\"1595\" data-end=\"1607\" data-col-size=\"sm\"><strong data-start=\"1597\" data-end=\"1606\">R-290<\/strong><\/td>\n<td data-start=\"1607\" data-end=\"1659\" data-col-size=\"md\">Certain heat-pump and self-contained applications<\/td>\n<td data-col-size=\"md\" data-start=\"1659\" data-end=\"1701\">Very low GWP but highly flammable (A3)<\/td>\n<\/tr>\n<tr data-start=\"1702\" data-end=\"1809\">\n<td data-start=\"1702\" data-end=\"1715\" data-col-size=\"sm\"><strong data-start=\"1704\" data-end=\"1714\">R-134a<\/strong><\/td>\n<td data-col-size=\"md\" data-start=\"1715\" data-end=\"1763\">Some older\/specialized heat-pump applications<\/td>\n<td data-col-size=\"md\" data-start=\"1763\" data-end=\"1809\">Higher GWP; declining in many applications<\/td>\n<\/tr>\n<tr data-start=\"1810\" data-end=\"1911\">\n<td data-start=\"1810\" data-end=\"1823\" data-col-size=\"sm\"><strong data-start=\"1812\" data-end=\"1822\">R-407C<\/strong><\/td>\n<td data-start=\"1823\" data-end=\"1859\" data-col-size=\"md\">Some commercial HVAC applications<\/td>\n<td data-col-size=\"md\" data-start=\"1859\" data-end=\"1911\">Blend used in various refrigeration\/HVAC systems<\/td>\n<\/tr>\n<tr data-start=\"1912\" data-end=\"2034\">\n<td data-start=\"1912\" data-end=\"1925\" data-col-size=\"sm\"><strong data-start=\"1914\" data-end=\"1924\">R-513A<\/strong><\/td>\n<td data-start=\"1925\" data-end=\"1978\" data-col-size=\"md\">Certain commercial refrigeration\/HVAC applications<\/td>\n<td data-col-size=\"md\" data-start=\"1978\" data-end=\"2034\">Lower-GWP alternative to R-134a in some applications<\/td>\n<\/tr>\n<tr data-start=\"2035\" data-end=\"2141\">\n<td data-start=\"2035\" data-end=\"2053\" data-col-size=\"sm\"><strong data-start=\"2037\" data-end=\"2052\">R-744 (CO\u2082)<\/strong><\/td>\n<td data-col-size=\"md\" data-start=\"2053\" data-end=\"2103\">Heat-pump water heating and specialized systems<\/td>\n<td data-col-size=\"md\" data-start=\"2103\" data-end=\"2141\">Very low GWP; high-pressure system<\/td>\n<\/tr>\n<tr data-start=\"2142\" data-end=\"2240\">\n<td data-start=\"2142\" data-end=\"2164\" data-col-size=\"sm\"><strong data-start=\"2144\" data-end=\"2163\">R-717 (Ammonia)<\/strong><\/td>\n<td data-col-size=\"md\" data-start=\"2164\" data-end=\"2188\">Industrial heat pumps<\/td>\n<td data-col-size=\"md\" data-start=\"2188\" data-end=\"2240\">Very low GWP; specialized industrial application<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<p dir=\"auto\" data-start=\"2242\" data-end=\"2453\">The EPA&#8217;s current residential\/light-commercial heat-pump listings include R-32, R-410A, R-454B and R-290 among acceptable refrigerant options under specified use conditions.<\/p>\n<hr data-start=\"2455\" data-end=\"2458\" \/>\n<h2 dir=\"auto\" data-section-id=\"ry6140\" data-start=\"2460\" data-end=\"2500\"><span class=\"ez-toc-section\" id=\"What_Is_the_Gas_in_a_Heat_Pump_Called\"><\/span>What Is the Gas in a Heat Pump Called?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"auto\" data-start=\"2502\" data-end=\"2552\">The \u201cgas\u201d is technically called a <strong data-start=\"2536\" data-end=\"2551\">refrigerant<\/strong>.<\/p>\n<p dir=\"auto\" data-start=\"2554\" data-end=\"2649\">A refrigerant is a working fluid that circulates through the heat pump&#8217;s refrigeration circuit.<\/p>\n<p dir=\"auto\" data-start=\"2651\" data-end=\"2727\"><strong>It changes pressure and temperature as it passes through components such as:<\/strong><\/p>\n<ol data-start=\"2729\" data-end=\"2788\">\n<li data-section-id=\"1b5j9i9\" data-start=\"2729\" data-end=\"2742\">Compressor<\/li>\n<li data-section-id=\"twdgog\" data-start=\"2743\" data-end=\"2755\">Condenser<\/li>\n<li data-section-id=\"9pjf61\" data-start=\"2756\" data-end=\"2774\">Expansion valve<\/li>\n<li data-section-id=\"rtpefc\" data-start=\"2775\" data-end=\"2788\">Evaporator<\/li>\n<\/ol>\n<p dir=\"auto\" data-start=\"2790\" data-end=\"2912\">The refrigerant enables the heat pump to <strong data-start=\"2831\" data-end=\"2911\">absorb heat from one location and reject or deliver that heat somewhere else<\/strong>.<\/p>\n<p dir=\"auto\" data-start=\"2914\" data-end=\"2935\">So when someone asks:<\/p>\n<blockquote data-start=\"2937\" data-end=\"2973\">\n<p dir=\"auto\" data-start=\"2939\" data-end=\"2973\">\u201cWhat gas is used in a heat pump?\u201d<\/p>\n<\/blockquote>\n<p dir=\"auto\" data-start=\"2975\" data-end=\"3009\">the technically correct answer is:<\/p>\n<blockquote data-start=\"3011\" data-end=\"3119\">\n<p dir=\"auto\" data-start=\"3013\" data-end=\"3119\"><strong data-start=\"3013\" data-end=\"3119\">A heat pump uses a refrigerant, and the specific refrigerant depends on the equipment and application.<\/strong><\/p>\n<\/blockquote>\n<hr data-start=\"3121\" data-end=\"3124\" \/>\n<h2 dir=\"auto\" data-section-id=\"125kseq\" data-start=\"3126\" data-end=\"3169\"><span class=\"ez-toc-section\" id=\"How_Does_Refrigerant_Work_in_a_Heat_Pump\"><\/span>How Does Refrigerant Work in a Heat Pump?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"auto\" data-start=\"3171\" data-end=\"3220\"><strong>A simplified refrigeration cycle looks like this:<\/strong><\/p>\n<p dir=\"auto\" data-start=\"3222\" data-end=\"3292\"><strong data-start=\"3222\" data-end=\"3292\">Evaporator \u2192 Compressor \u2192 Condenser \u2192 Expansion Valve \u2192 Evaporator<\/strong><\/p>\n<h3 dir=\"auto\" data-section-id=\"1snnd8d\" data-start=\"3294\" data-end=\"3317\">Step 1: Evaporation<\/h3>\n<p dir=\"auto\" data-start=\"3319\" data-end=\"3366\">The refrigerant absorbs heat at the evaporator.<\/p>\n<h3 dir=\"auto\" data-section-id=\"1aoqn3m\" data-start=\"3368\" data-end=\"3391\">Step 2: Compression<\/h3>\n<p dir=\"auto\" data-start=\"3393\" data-end=\"3456\">The compressor raises the refrigerant pressure and temperature.<\/p>\n<h3 dir=\"auto\" data-section-id=\"1p6qo9q\" data-start=\"3458\" data-end=\"3482\">Step 3: Condensation<\/h3>\n<p dir=\"auto\" data-start=\"3484\" data-end=\"3553\">The high-temperature refrigerant releases heat through the condenser.<\/p>\n<h3 dir=\"auto\" data-section-id=\"12ifutf\" data-start=\"3555\" data-end=\"3576\">Step 4: Expansion<\/h3>\n<p dir=\"auto\" data-start=\"3578\" data-end=\"3647\">The expansion valve reduces the refrigerant pressure and temperature.<\/p>\n<h3 dir=\"auto\" data-section-id=\"wes9ov\" data-start=\"3649\" data-end=\"3674\">Step 5: Cycle Repeats<\/h3>\n<p dir=\"auto\" data-start=\"3676\" data-end=\"3742\">The refrigerant returns to the evaporator and the cycle continues.<\/p>\n<p dir=\"auto\" data-start=\"3744\" data-end=\"3851\">In a <strong data-start=\"3749\" data-end=\"3773\">reversible heat pump<\/strong>, the direction of heat transfer can be changed to provide heating or cooling.<\/p>\n<hr data-start=\"3853\" data-end=\"3856\" \/>\n<h2 dir=\"auto\" data-section-id=\"134ov6a\" data-start=\"3858\" data-end=\"3911\"><span class=\"ez-toc-section\" id=\"What_Refrigerant_Does_VIPUL_HVAC_Use_in_Heat_Pumps\"><\/span>What Refrigerant Does VIPUL HVAC Use in Heat Pumps?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"auto\" data-start=\"3913\" data-end=\"4283\">VIPUL HVAC&#8217;s current heat-pump page specifies <strong data-start=\"3959\" data-end=\"3990\">\u201ceco-friendly refrigerants\u201d<\/strong>, but does not publish one universal refrigerant designation such as R-32 or R-410A for its entire heat-pump range. The company lists both <strong data-start=\"4129\" data-end=\"4171\">air-source and water-source heat pumps<\/strong>, with systems designed according to the application and hot-water demand.<\/p>\n<p dir=\"auto\" data-start=\"4285\" data-end=\"4529\">Therefore, for a VIPUL heat-pump project, the correct approach is to select the refrigerant according to the <strong data-start=\"4394\" data-end=\"4453\">specific equipment model and manufacturer specification<\/strong>, rather than assuming that every VIPUL heat pump uses the same refrigerant.<\/p>\n<p dir=\"auto\" data-start=\"4531\" data-end=\"4625\">This is important because different heat-pump applications can require different refrigerants.<\/p>\n<hr data-start=\"4627\" data-end=\"4630\" \/>\n<h2 dir=\"auto\" data-section-id=\"8ra6dq\" data-start=\"4632\" data-end=\"4661\"><span class=\"ez-toc-section\" id=\"Is_R-32_Used_in_Heat_Pumps\"><\/span>Is R-32 Used in Heat Pumps?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"auto\" data-start=\"4663\" data-end=\"4671\"><strong data-start=\"4663\" data-end=\"4671\">Yes.<\/strong><\/p>\n<p dir=\"auto\" data-start=\"4673\" data-end=\"4735\">R-32 is used in some air-conditioning and heat-pump equipment.<\/p>\n<p dir=\"auto\" data-start=\"4737\" data-end=\"5105\">The U.S. EPA lists HFC-32 as an acceptable refrigerant for certain residential and light-commercial AC and heat-pump applications, subject to use conditions. Its listed GWP is <strong data-start=\"4913\" data-end=\"4920\">675<\/strong> and its ASHRAE safety classification is <strong data-start=\"4961\" data-end=\"4968\">A2L<\/strong>, meaning lower flammability than A3 refrigerants but still requiring appropriate safety practices.<\/p>\n<p dir=\"auto\" data-start=\"5107\" data-end=\"5247\">The European Commission also identifies R-32 as a refrigerant used in domestic heat-pump applications.<\/p>\n<h3 dir=\"auto\" data-section-id=\"14klv7t\" data-start=\"5249\" data-end=\"5271\">Advantages of R-32<\/h3>\n<ul data-start=\"5273\" data-end=\"5409\">\n<li data-section-id=\"1rbm2nn\" data-start=\"5273\" data-end=\"5296\">Lower GWP than R-410A<\/li>\n<li data-section-id=\"yhp9in\" data-start=\"5297\" data-end=\"5329\">Good thermodynamic performance<\/li>\n<li data-section-id=\"y8okbv\" data-start=\"5330\" data-end=\"5368\">Widely used in modern HVAC equipment<\/li>\n<li data-section-id=\"plqthk\" data-start=\"5369\" data-end=\"5409\">Suitable for certain heat-pump designs<\/li>\n<\/ul>\n<h3 dir=\"auto\" data-section-id=\"9bqaba\" data-start=\"5411\" data-end=\"5438\">Important consideration<\/h3>\n<p dir=\"auto\" data-start=\"5440\" data-end=\"5573\">R-32 is classified <strong data-start=\"5459\" data-end=\"5466\">A2L<\/strong>, so equipment design, installation, charging and servicing must follow the applicable safety requirements.<\/p>\n<hr data-start=\"5575\" data-end=\"5578\" \/>\n<h2 dir=\"auto\" data-section-id=\"n4vue3\" data-start=\"5580\" data-end=\"5611\"><span class=\"ez-toc-section\" id=\"Is_R-410A_Used_in_Heat_Pumps\"><\/span>Is R-410A Used in Heat Pumps?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"auto\" data-start=\"5613\" data-end=\"5621\"><strong data-start=\"5613\" data-end=\"5621\">Yes.<\/strong><\/p>\n<p dir=\"auto\" data-start=\"5623\" data-end=\"5728\">R-410A has been widely used in residential and light-commercial air-conditioning and heat-pump equipment.<\/p>\n<p dir=\"auto\" data-start=\"5730\" data-end=\"5895\">The EPA lists R-410A as an acceptable refrigerant for specified residential and light-commercial AC and heat-pump applications.<\/p>\n<p dir=\"auto\" data-start=\"5897\" data-end=\"5908\"><strong>R-410A has:<\/strong><\/p>\n<ul data-start=\"5910\" data-end=\"6018\">\n<li data-section-id=\"1w3tnk2\" data-start=\"5910\" data-end=\"5942\">Zero ozone-depletion potential<\/li>\n<li data-section-id=\"ptvpie\" data-start=\"5943\" data-end=\"5966\">A relatively high GWP<\/li>\n<li data-section-id=\"p4dof9\" data-start=\"5967\" data-end=\"6018\">A1 safety classification in the cited EPA listing<\/li>\n<\/ul>\n<p dir=\"auto\" data-start=\"6020\" data-end=\"6209\">The EPA explains that R-410A became an important replacement for older R-22 systems, but also notes that R-410A has climate impacts because of its GWP.<\/p>\n<p dir=\"auto\" data-start=\"6211\" data-end=\"6321\">This is one reason the HVAC industry has been moving toward lower-GWP refrigerants in many newer applications.<\/p>\n<hr data-start=\"6323\" data-end=\"6326\" \/>\n<h2 dir=\"auto\" data-section-id=\"91qcuw\" data-start=\"6328\" data-end=\"6359\"><span class=\"ez-toc-section\" id=\"Is_R-454B_Used_in_Heat_Pumps\"><\/span>Is R-454B Used in Heat Pumps?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"auto\" data-start=\"6361\" data-end=\"6419\"><strong data-start=\"6361\" data-end=\"6419\">Yes, in certain newer HVAC and heat-pump applications.<\/strong><\/p>\n<p dir=\"auto\" data-start=\"6421\" data-end=\"6489\">R-454B is an HFC\/HFO blend with significantly lower GWP than R-410A.<\/p>\n<p dir=\"auto\" data-start=\"6491\" data-end=\"6695\">The EPA lists R-454B as acceptable for certain residential and light-commercial AC and heat-pump applications, subject to use conditions. It is classified as <strong data-start=\"6649\" data-end=\"6656\">A2L<\/strong>.<\/p>\n<p dir=\"auto\" data-start=\"6697\" data-end=\"6853\">The European Commission also identifies R-454B as a lower-GWP alternative to R-410A in certain heat-pump applications.<\/p>\n<p dir=\"auto\" data-start=\"6855\" data-end=\"6863\"><strong>However:<\/strong><\/p>\n<p dir=\"auto\" data-start=\"6865\" data-end=\"6926\"><strong data-start=\"6865\" data-end=\"6926\">R-454B is not a universal drop-in replacement for R-410A.<\/strong><\/p>\n<p dir=\"auto\" data-start=\"6928\" data-end=\"6992\">The equipment must be designed and approved for the refrigerant.<\/p>\n<hr data-start=\"6994\" data-end=\"6997\" \/>\n<h2 dir=\"auto\" data-section-id=\"ozqsus\" data-start=\"6999\" data-end=\"7029\"><span class=\"ez-toc-section\" id=\"Is_R-290_Used_in_Heat_Pumps\"><\/span>Is R-290 Used in Heat Pumps?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"auto\" data-start=\"7031\" data-end=\"7064\"><strong data-start=\"7031\" data-end=\"7064\">Yes, in certain applications.<\/strong><\/p>\n<p dir=\"auto\" data-start=\"7066\" data-end=\"7109\">R-290 is <strong data-start=\"7075\" data-end=\"7086\">propane<\/strong> used as a refrigerant.<\/p>\n<p dir=\"auto\" data-start=\"7111\" data-end=\"7175\">It has an extremely low GWP compared with many HFC refrigerants.<\/p>\n<p dir=\"auto\" data-start=\"7177\" data-end=\"7351\">The European Commission lists R-290 as a climate-friendly refrigerant option for certain domestic and industrial heat-pump applications.<\/p>\n<p dir=\"auto\" data-start=\"7353\" data-end=\"7421\">However, R-290 is classified <strong data-start=\"7382\" data-end=\"7388\">A3<\/strong>, meaning it is highly flammable.<\/p>\n<p dir=\"auto\" data-start=\"7423\" data-end=\"7477\"><strong>Therefore, equipment using R-290 requires appropriate:<\/strong><\/p>\n<ul data-start=\"7479\" data-end=\"7617\">\n<li data-section-id=\"rbvq7z\" data-start=\"7479\" data-end=\"7494\">System design<\/li>\n<li data-section-id=\"14r9q2d\" data-start=\"7495\" data-end=\"7522\">Refrigerant charge limits<\/li>\n<li data-section-id=\"1n55sq2\" data-start=\"7523\" data-end=\"7548\">Installation procedures<\/li>\n<li data-section-id=\"xgohek\" data-start=\"7549\" data-end=\"7577\">Ventilation considerations<\/li>\n<li data-section-id=\"17qea8w\" data-start=\"7578\" data-end=\"7595\">Safety controls<\/li>\n<li data-section-id=\"llv3sg\" data-start=\"7596\" data-end=\"7617\">Technician training<\/li>\n<\/ul>\n<p dir=\"auto\" data-start=\"7619\" data-end=\"7774\">The EPA also lists R-290 as acceptable for specified self-contained room AC applications subject to use conditions.<\/p>\n<hr data-start=\"7776\" data-end=\"7779\" \/>\n<h2 dir=\"auto\" data-section-id=\"nbwe4e\" data-start=\"7781\" data-end=\"7809\"><span class=\"ez-toc-section\" id=\"Is_CO%E2%82%82_Used_in_Heat_Pumps\"><\/span>Is CO\u2082 Used in Heat Pumps?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"auto\" data-start=\"7811\" data-end=\"7815\">Yes.<\/p>\n<p dir=\"auto\" data-start=\"7817\" data-end=\"7950\">CO\u2082 is designated <strong data-start=\"7835\" data-end=\"7844\">R-744<\/strong> and is increasingly relevant in certain heat-pump applications, particularly <strong data-start=\"7922\" data-end=\"7949\">heat-pump water heating<\/strong>.<\/p>\n<p dir=\"auto\" data-start=\"7952\" data-end=\"8169\">The European Commission identifies R-744 as a refrigerant for domestic and industrial heat-pump applications and lists a GWP of approximately <strong data-start=\"8094\" data-end=\"8099\">1<\/strong> under its stated methodology.<\/p>\n<p dir=\"auto\" data-start=\"8171\" data-end=\"8287\">CO\u2082 systems operate at relatively high pressures, so they require equipment specifically designed for CO\u2082 operation.<\/p>\n<p dir=\"auto\" data-start=\"8289\" data-end=\"8380\">A CO\u2082 heat pump should therefore never be treated as simply another refrigerant conversion.<\/p>\n<hr data-start=\"8382\" data-end=\"8385\" \/>\n<h2 dir=\"auto\" data-section-id=\"hcw3lk\" data-start=\"8387\" data-end=\"8419\"><span class=\"ez-toc-section\" id=\"Is_Ammonia_Used_in_Heat_Pumps\"><\/span>Is Ammonia Used in Heat Pumps?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"auto\" data-start=\"8421\" data-end=\"8425\">Yes.<\/p>\n<p dir=\"auto\" data-start=\"8427\" data-end=\"8459\">Ammonia is designated <strong data-start=\"8449\" data-end=\"8458\">R-717<\/strong>.<\/p>\n<p dir=\"auto\" data-start=\"8461\" data-end=\"8611\">It is primarily associated with <strong data-start=\"8493\" data-end=\"8559\">industrial refrigeration and industrial heat-pump applications<\/strong>, rather than ordinary residential split heat pumps.<\/p>\n<p dir=\"auto\" data-start=\"8613\" data-end=\"8788\">The European Commission identifies R-717 for industrial heat-pump applications and lists it as having zero GWP in the referenced table.<\/p>\n<p dir=\"auto\" data-start=\"8790\" data-end=\"8902\">Ammonia systems require specialized engineering because ammonia has specific toxicity and safety considerations.<\/p>\n<hr data-start=\"8904\" data-end=\"8907\" \/>\n<h2 dir=\"auto\" data-section-id=\"wpt8uu\" data-start=\"8909\" data-end=\"8929\"><span class=\"ez-toc-section\" id=\"What_About_R-134a\"><\/span>What About R-134a?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"auto\" data-start=\"8931\" data-end=\"9022\">R-134a has been used in various refrigeration, air-conditioning and heat-pump applications.<\/p>\n<p dir=\"auto\" data-start=\"9024\" data-end=\"9236\">The EPA lists HFC-134a as an acceptable refrigerant in specified residential\/light-commercial AC and heat-pump applications, with a GWP of <strong data-start=\"9163\" data-end=\"9172\">1,430<\/strong> in its current listing.<\/p>\n<p dir=\"auto\" data-start=\"9238\" data-end=\"9326\">However, newer lower-GWP refrigerant options are increasingly important in many markets.<\/p>\n<hr data-start=\"9328\" data-end=\"9331\" \/>\n<h2 dir=\"auto\" data-section-id=\"qjt64e\" data-start=\"9333\" data-end=\"9364\"><span class=\"ez-toc-section\" id=\"R-32_vs_R-410A_for_Heat_Pumps\"><\/span>R-32 vs R-410A for Heat Pumps<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"auto\" data-start=\"9366\" data-end=\"9389\"><strong>One common question is:<\/strong><\/p>\n<blockquote data-start=\"9391\" data-end=\"9431\">\n<p dir=\"auto\" data-start=\"9393\" data-end=\"9431\"><strong data-start=\"9393\" data-end=\"9431\">\u201cWhich is better, R-32 or R-410A?\u201d<\/strong><\/p>\n<\/blockquote>\n<p dir=\"auto\" data-start=\"9433\" data-end=\"9493\">There isn&#8217;t a universal answer independent of the equipment.<\/p>\n<div class=\"group TyagGW_tableContainer\" dir=\"auto\">\n<div class=\"TyagGW_tableWrapper flex flex-col-reverse w-fit\" tabindex=\"-1\">\n<table class=\"w-fit min-w-(--thread-content-width)\" dir=\"auto\" style=\"height: 266px;\" width=\"774\" data-start=\"9495\" data-end=\"9790\">\n<thead data-start=\"9495\" data-end=\"9521\">\n<tr data-start=\"9495\" data-end=\"9521\">\n<th class=\"last:pe-10\" data-start=\"9495\" data-end=\"9504\" data-col-size=\"sm\">Factor<\/th>\n<th class=\"last:pe-10\" data-start=\"9504\" data-end=\"9511\" data-col-size=\"sm\">R-32<\/th>\n<th class=\"last:pe-10\" data-start=\"9511\" data-end=\"9521\" data-col-size=\"sm\">R-410A<\/th>\n<\/tr>\n<\/thead>\n<tbody data-start=\"9536\" data-end=\"9790\">\n<tr data-start=\"9536\" data-end=\"9574\">\n<td data-start=\"9536\" data-end=\"9555\" data-col-size=\"sm\">Refrigerant type<\/td>\n<td data-start=\"9555\" data-end=\"9561\" data-col-size=\"sm\">HFC<\/td>\n<td data-start=\"9561\" data-end=\"9574\" data-col-size=\"sm\">HFC blend<\/td>\n<\/tr>\n<tr data-start=\"9575\" data-end=\"9611\">\n<td data-start=\"9575\" data-end=\"9596\" data-col-size=\"sm\">GWP in EPA listing<\/td>\n<td data-start=\"9596\" data-end=\"9602\" data-col-size=\"sm\">675<\/td>\n<td data-start=\"9602\" data-end=\"9611\" data-col-size=\"sm\">2,090<\/td>\n<\/tr>\n<tr data-start=\"9612\" data-end=\"9627\">\n<td data-start=\"9612\" data-end=\"9618\" data-col-size=\"sm\">ODP<\/td>\n<td data-start=\"9618\" data-end=\"9622\" data-col-size=\"sm\">0<\/td>\n<td data-col-size=\"sm\" data-start=\"9622\" data-end=\"9627\">0<\/td>\n<\/tr>\n<tr data-start=\"9628\" data-end=\"9664\">\n<td data-start=\"9628\" data-end=\"9652\" data-col-size=\"sm\">Safety classification<\/td>\n<td data-start=\"9652\" data-end=\"9658\" data-col-size=\"sm\">A2L<\/td>\n<td data-start=\"9658\" data-end=\"9664\" data-col-size=\"sm\">A1<\/td>\n<\/tr>\n<tr data-start=\"9665\" data-end=\"9693\">\n<td data-start=\"9665\" data-end=\"9680\" data-col-size=\"sm\">Used in HVAC<\/td>\n<td data-start=\"9680\" data-end=\"9686\" data-col-size=\"sm\">Yes<\/td>\n<td data-start=\"9686\" data-end=\"9693\" data-col-size=\"sm\">Yes<\/td>\n<\/tr>\n<tr data-start=\"9694\" data-end=\"9728\">\n<td data-start=\"9694\" data-end=\"9715\" data-col-size=\"sm\">Used in heat pumps<\/td>\n<td data-start=\"9715\" data-end=\"9721\" data-col-size=\"sm\">Yes<\/td>\n<td data-start=\"9721\" data-end=\"9728\" data-col-size=\"sm\">Yes<\/td>\n<\/tr>\n<tr data-start=\"9729\" data-end=\"9790\">\n<td data-start=\"9729\" data-end=\"9755\" data-col-size=\"sm\">Equipment compatibility<\/td>\n<td data-start=\"9755\" data-end=\"9772\" data-col-size=\"sm\">Model-specific<\/td>\n<td data-col-size=\"sm\" data-start=\"9772\" data-end=\"9790\">Model-specific<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<p dir=\"auto\" data-start=\"9792\" data-end=\"9907\">The EPA&#8217;s current data show R-32 has a substantially lower GWP than R-410A.<\/p>\n<p dir=\"auto\" data-start=\"9909\" data-end=\"10018\">However, <strong data-start=\"9918\" data-end=\"10017\">lower GWP does not mean you can replace one refrigerant with the other in an existing heat pump<\/strong>.<\/p>\n<hr data-start=\"10020\" data-end=\"10023\" \/>\n<h2 dir=\"auto\" data-section-id=\"1l2cy80\" data-start=\"10025\" data-end=\"10043\"><span class=\"ez-toc-section\" id=\"R-410A_vs_R-454B\"><\/span>R-410A vs R-454B<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"auto\" data-start=\"10045\" data-end=\"10151\">R-454B is one of the newer lower-GWP alternatives associated with R-410A replacement in certain equipment.<\/p>\n<p dir=\"auto\" data-start=\"10153\" data-end=\"10167\"><strong>The EPA lists:<\/strong><\/p>\n<ul data-start=\"10169\" data-end=\"10206\">\n<li data-section-id=\"k5515q\" data-start=\"10169\" data-end=\"10188\">R-410A: GWP 2,090<\/li>\n<li data-section-id=\"1pobfl5\" data-start=\"10189\" data-end=\"10206\">R-454B: GWP 470<\/li>\n<\/ul>\n<p dir=\"auto\" data-start=\"10208\" data-end=\"10310\">in its current residential\/light-commercial heat-pump listing.<\/p>\n<p dir=\"auto\" data-start=\"10312\" data-end=\"10395\">However, the two refrigerants have different properties and safety classifications.<\/p>\n<p dir=\"auto\" data-start=\"10397\" data-end=\"10407\"><strong>Therefore:<\/strong><\/p>\n<p dir=\"auto\" data-start=\"10409\" data-end=\"10471\"><strong data-start=\"10409\" data-end=\"10471\">R-454B equipment must be designed and approved for R-454B.<\/strong><\/p>\n<p dir=\"auto\" data-start=\"10473\" data-end=\"10559\">Do not retrofit an existing R-410A system with R-454B simply because its GWP is lower.<\/p>\n<hr data-start=\"10561\" data-end=\"10564\" \/>\n<h2 dir=\"auto\" data-section-id=\"z5nvy6\" data-start=\"10566\" data-end=\"10604\"><span class=\"ez-toc-section\" id=\"Heat_Pump_Refrigerant_GWP_Comparison\"><\/span>Heat Pump Refrigerant GWP Comparison<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"auto\" data-start=\"10606\" data-end=\"10694\">The following values are useful for understanding why refrigerant selection is changing:<\/p>\n<div class=\"group TyagGW_tableContainer\" dir=\"auto\">\n<div class=\"TyagGW_tableWrapper flex flex-col-reverse w-fit\" tabindex=\"-1\">\n<table class=\"w-fit min-w-(--thread-content-width)\" dir=\"auto\" data-start=\"10696\" data-end=\"10947\">\n<thead data-start=\"10696\" data-end=\"10750\">\n<tr data-start=\"10696\" data-end=\"10750\">\n<th class=\"last:pe-10\" data-start=\"10696\" data-end=\"10710\" data-col-size=\"sm\">Refrigerant<\/th>\n<th class=\"last:pe-10\" data-start=\"10710\" data-end=\"10725\" data-col-size=\"sm\">Approx. GWP*<\/th>\n<th class=\"last:pe-10\" data-start=\"10725\" data-end=\"10750\" data-col-size=\"sm\">Safety Classification<\/th>\n<\/tr>\n<\/thead>\n<tbody data-start=\"10766\" data-end=\"10947\">\n<tr data-start=\"10766\" data-end=\"10784\">\n<td data-start=\"10766\" data-end=\"10774\" data-col-size=\"sm\">R-290<\/td>\n<td data-start=\"10774\" data-end=\"10778\" data-col-size=\"sm\">3<\/td>\n<td data-start=\"10778\" data-end=\"10784\" data-col-size=\"sm\">A3<\/td>\n<\/tr>\n<tr data-start=\"10785\" data-end=\"10809\">\n<td data-start=\"10785\" data-end=\"10799\" data-col-size=\"sm\">R-744 (CO\u2082)<\/td>\n<td data-col-size=\"sm\" data-start=\"10799\" data-end=\"10803\">1<\/td>\n<td data-col-size=\"sm\" data-start=\"10803\" data-end=\"10809\">A1<\/td>\n<\/tr>\n<tr data-start=\"10810\" data-end=\"10830\">\n<td data-start=\"10810\" data-end=\"10817\" data-col-size=\"sm\">R-32<\/td>\n<td data-start=\"10817\" data-end=\"10823\" data-col-size=\"sm\">675<\/td>\n<td data-start=\"10823\" data-end=\"10830\" data-col-size=\"sm\">A2L<\/td>\n<\/tr>\n<tr data-start=\"10831\" data-end=\"10853\">\n<td data-start=\"10831\" data-end=\"10840\" data-col-size=\"sm\">R-454B<\/td>\n<td data-start=\"10840\" data-end=\"10846\" data-col-size=\"sm\">470<\/td>\n<td data-start=\"10846\" data-end=\"10853\" data-col-size=\"sm\">A2L<\/td>\n<\/tr>\n<tr data-start=\"10854\" data-end=\"10877\">\n<td data-start=\"10854\" data-end=\"10863\" data-col-size=\"sm\">R-410A<\/td>\n<td data-start=\"10863\" data-end=\"10871\" data-col-size=\"sm\">2,090<\/td>\n<td data-start=\"10871\" data-end=\"10877\" data-col-size=\"sm\">A1<\/td>\n<\/tr>\n<tr data-start=\"10878\" data-end=\"10901\">\n<td data-start=\"10878\" data-end=\"10887\" data-col-size=\"sm\">R-134a<\/td>\n<td data-start=\"10887\" data-end=\"10895\" data-col-size=\"sm\">1,430<\/td>\n<td data-start=\"10895\" data-end=\"10901\" data-col-size=\"sm\">A1<\/td>\n<\/tr>\n<tr data-start=\"10902\" data-end=\"10925\">\n<td data-start=\"10902\" data-end=\"10911\" data-col-size=\"sm\">R-407C<\/td>\n<td data-start=\"10911\" data-end=\"10919\" data-col-size=\"sm\">1,770<\/td>\n<td data-start=\"10919\" data-end=\"10925\" data-col-size=\"sm\">A1<\/td>\n<\/tr>\n<tr data-start=\"10926\" data-end=\"10947\">\n<td data-start=\"10926\" data-end=\"10935\" data-col-size=\"sm\">R-513A<\/td>\n<td data-start=\"10935\" data-end=\"10941\" data-col-size=\"sm\">630<\/td>\n<td data-start=\"10941\" data-end=\"10947\" data-col-size=\"sm\">A1<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<p dir=\"auto\" data-start=\"10949\" data-end=\"11146\">*Values vary slightly depending on the assessment methodology and regulatory source. The table above follows the EPA\/European sources cited in this article.<\/p>\n<hr data-start=\"11148\" data-end=\"11151\" \/>\n<h2 dir=\"auto\" data-section-id=\"1ia2hjs\" data-start=\"11153\" data-end=\"11195\"><span class=\"ez-toc-section\" id=\"Why_Are_Heat_Pump_Refrigerants_Changing\"><\/span>Why Are Heat Pump Refrigerants Changing?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"auto\" data-start=\"11197\" data-end=\"11287\">The HVAC industry is increasingly looking at refrigerants with lower environmental impact.<\/p>\n<p dir=\"auto\" data-start=\"11289\" data-end=\"11344\"><strong>Historically, HVAC equipment used refrigerants such as:<\/strong><\/p>\n<ul data-start=\"11346\" data-end=\"11370\">\n<li data-section-id=\"1j4criv\" data-start=\"11346\" data-end=\"11352\">R-22<\/li>\n<li data-section-id=\"5m0fs0\" data-start=\"11353\" data-end=\"11361\">R-134a<\/li>\n<li data-section-id=\"5lwmw3\" data-start=\"11362\" data-end=\"11370\">R-410A<\/li>\n<\/ul>\n<p dir=\"auto\" data-start=\"11372\" data-end=\"11403\"><strong>Newer alternatives can include:<\/strong><\/p>\n<ul data-start=\"11405\" data-end=\"11453\">\n<li data-section-id=\"1j4crjq\" data-start=\"11405\" data-end=\"11411\">R-32<\/li>\n<li data-section-id=\"5lwq5c\" data-start=\"11412\" data-end=\"11420\">R-454B<\/li>\n<li data-section-id=\"5lwq5d\" data-start=\"11421\" data-end=\"11429\">R-454C<\/li>\n<li data-section-id=\"177vv1o\" data-start=\"11430\" data-end=\"11437\">R-290<\/li>\n<li data-section-id=\"177vscg\" data-start=\"11438\" data-end=\"11445\">R-744<\/li>\n<li data-section-id=\"177vsbq\" data-start=\"11446\" data-end=\"11453\">R-717<\/li>\n<\/ul>\n<p dir=\"auto\" data-start=\"11455\" data-end=\"11494\"><strong>The appropriate refrigerant depends on:<\/strong><\/p>\n<ul data-start=\"11496\" data-end=\"11651\">\n<li data-section-id=\"12eubay\" data-start=\"11496\" data-end=\"11512\">Equipment type<\/li>\n<li data-section-id=\"yil0yk\" data-start=\"11513\" data-end=\"11523\">Capacity<\/li>\n<li data-section-id=\"15o510y\" data-start=\"11524\" data-end=\"11537\">Application<\/li>\n<li data-section-id=\"1ehwf14\" data-start=\"11538\" data-end=\"11559\">Safety requirements<\/li>\n<li data-section-id=\"4bsz15\" data-start=\"11560\" data-end=\"11583\">Operating temperature<\/li>\n<li data-section-id=\"1f9eijs\" data-start=\"11584\" data-end=\"11601\">System pressure<\/li>\n<li data-section-id=\"r5wzav\" data-start=\"11602\" data-end=\"11629\">Environmental regulations<\/li>\n<li data-section-id=\"r4wlcd\" data-start=\"11630\" data-end=\"11651\">Manufacturer design<\/li>\n<\/ul>\n<p dir=\"auto\" data-start=\"11653\" data-end=\"11916\">The EPA&#8217;s current technology-transition rules illustrate that refrigerant requirements are becoming increasingly application-specific and that certain high-GWP refrigerants are subject to restrictions in particular sectors.<\/p>\n<hr data-start=\"11918\" data-end=\"11921\" \/>\n<h2 dir=\"auto\" data-section-id=\"120pvv2\" data-start=\"11923\" data-end=\"11971\"><span class=\"ez-toc-section\" id=\"Can_You_Change_the_Refrigerant_in_a_Heat_Pump\"><\/span>Can You Change the Refrigerant in a Heat Pump?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"auto\" data-start=\"11973\" data-end=\"11995\"><strong data-start=\"11973\" data-end=\"11995\">Not automatically.<\/strong><\/p>\n<p dir=\"auto\" data-start=\"11997\" data-end=\"12045\">This is a very important HVAC maintenance point.<\/p>\n<p dir=\"auto\" data-start=\"12047\" data-end=\"12069\"><strong>You should not assume:<\/strong><\/p>\n<blockquote data-start=\"12071\" data-end=\"12116\">\n<p dir=\"auto\" data-start=\"12073\" data-end=\"12116\">R-410A heat pump \u2192 remove R-410A \u2192 add R-32<\/p>\n<\/blockquote>\n<p dir=\"auto\" data-start=\"12118\" data-end=\"12121\"><strong>or:<\/strong><\/p>\n<blockquote data-start=\"12123\" data-end=\"12154\">\n<p dir=\"auto\" data-start=\"12125\" data-end=\"12154\">R-410A heat pump \u2192 add R-454B<\/p>\n<\/blockquote>\n<p dir=\"auto\" data-start=\"12156\" data-end=\"12218\">These refrigerants are <strong data-start=\"12179\" data-end=\"12217\">not universal drop-in replacements<\/strong>.<\/p>\n<p dir=\"auto\" data-start=\"12220\" data-end=\"12252\"><strong>A refrigerant change can affect:<\/strong><\/p>\n<ul data-start=\"12254\" data-end=\"12429\">\n<li data-section-id=\"1od8urx\" data-start=\"12254\" data-end=\"12264\">Pressure<\/li>\n<li data-section-id=\"jrbl5y\" data-start=\"12265\" data-end=\"12287\">Compressor operation<\/li>\n<li data-section-id=\"1jmt3vw\" data-start=\"12288\" data-end=\"12307\">Oil compatibility<\/li>\n<li data-section-id=\"cs34a1\" data-start=\"12308\" data-end=\"12326\">Expansion device<\/li>\n<li data-section-id=\"1n83ibw\" data-start=\"12327\" data-end=\"12355\">Heat-exchanger performance<\/li>\n<li data-section-id=\"1t8z4ib\" data-start=\"12356\" data-end=\"12376\">Refrigerant charge<\/li>\n<li data-section-id=\"1kltnwc\" data-start=\"12377\" data-end=\"12387\">Controls<\/li>\n<li data-section-id=\"1ehwf14\" data-start=\"12388\" data-end=\"12409\">Safety requirements<\/li>\n<li data-section-id=\"7uefqy\" data-start=\"12410\" data-end=\"12429\">System efficiency<\/li>\n<\/ul>\n<p dir=\"auto\" data-start=\"12431\" data-end=\"12515\">The equipment manufacturer&#8217;s instructions should determine the approved refrigerant.<\/p>\n<hr data-start=\"12517\" data-end=\"12520\" \/>\n<h2 dir=\"auto\" data-section-id=\"1v3ouok\" data-start=\"12522\" data-end=\"12553\"><span class=\"ez-toc-section\" id=\"Can_You_Mix_Two_Refrigerants\"><\/span>Can You Mix Two Refrigerants?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"auto\" data-start=\"12555\" data-end=\"12673\"><strong data-start=\"12555\" data-end=\"12673\">No\u2014do not mix refrigerants unless the equipment manufacturer specifically designs and approves a particular blend.<\/strong><\/p>\n<p dir=\"auto\" data-start=\"12675\" data-end=\"12752\">R-32, R-410A, R-454B, R-290 and other refrigerants have different properties.<\/p>\n<p dir=\"auto\" data-start=\"12754\" data-end=\"12842\">An HVAC technician should identify the existing refrigerant before servicing the system.<\/p>\n<hr data-start=\"12844\" data-end=\"12847\" \/>\n<h2 dir=\"auto\" data-section-id=\"1r48j4x\" data-start=\"12849\" data-end=\"12905\"><span class=\"ez-toc-section\" id=\"How_Do_You_Know_Which_Refrigerant_Your_Heat_Pump_Uses\"><\/span>How Do You Know Which Refrigerant Your Heat Pump Uses?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"auto\" data-start=\"12907\" data-end=\"12966\">The easiest method is to check the <strong data-start=\"12942\" data-end=\"12965\">equipment nameplate<\/strong>.<\/p>\n<p dir=\"auto\" data-start=\"12968\" data-end=\"12997\"><strong>Look for information such as:<\/strong><\/p>\n<p dir=\"auto\" data-start=\"12999\" data-end=\"13020\"><strong data-start=\"12999\" data-end=\"13020\">Refrigerant: R-32<\/strong><\/p>\n<p dir=\"auto\" data-start=\"13022\" data-end=\"13024\"><strong>or<\/strong><\/p>\n<p dir=\"auto\" data-start=\"13026\" data-end=\"13049\"><strong data-start=\"13026\" data-end=\"13049\">Refrigerant: R-410A<\/strong><\/p>\n<p dir=\"auto\" data-start=\"13051\" data-end=\"13082\"><strong>The nameplate may also specify:<\/strong><\/p>\n<ul data-start=\"13084\" data-end=\"13202\">\n<li data-section-id=\"1t8z4ib\" data-start=\"13084\" data-end=\"13104\">Refrigerant charge<\/li>\n<li data-section-id=\"1gxp65g\" data-start=\"13105\" data-end=\"13119\">Model number<\/li>\n<li data-section-id=\"1wapyp7\" data-start=\"13120\" data-end=\"13135\">Serial number<\/li>\n<li data-section-id=\"12krrlc\" data-start=\"13136\" data-end=\"13156\">Operating pressure<\/li>\n<li data-section-id=\"8jy0ip\" data-start=\"13157\" data-end=\"13176\">Electrical rating<\/li>\n<li data-section-id=\"1g1pk0v\" data-start=\"13177\" data-end=\"13191\">Manufacturer<\/li>\n<li data-section-id=\"yil0yk\" data-start=\"13192\" data-end=\"13202\">Capacity<\/li>\n<\/ul>\n<p dir=\"auto\" data-start=\"13204\" data-end=\"13223\"><strong>You can also check:<\/strong><\/p>\n<ol data-start=\"13225\" data-end=\"13346\">\n<li data-section-id=\"obh8m4\" data-start=\"13225\" data-end=\"13247\">Installation manual<\/li>\n<li data-section-id=\"vn5yb1\" data-start=\"13248\" data-end=\"13268\">Product datasheet<\/li>\n<li data-section-id=\"92i4qc\" data-start=\"13269\" data-end=\"13292\">Manufacturer website<\/li>\n<li data-section-id=\"2pmf8w\" data-start=\"13293\" data-end=\"13317\">Service documentation<\/li>\n<li data-section-id=\"19bz9i5\" data-start=\"13318\" data-end=\"13346\">Original purchase invoice<\/li>\n<\/ol>\n<p dir=\"auto\" data-start=\"13348\" data-end=\"13442\">If the label is missing or unclear, have a qualified HVAC technician identify the refrigerant.<\/p>\n<hr data-start=\"13444\" data-end=\"13447\" \/>\n<h2 dir=\"auto\" data-section-id=\"1bss2pt\" data-start=\"13449\" data-end=\"13503\"><span class=\"ez-toc-section\" id=\"What_Refrigerant_Is_Used_in_Heat_Pump_Water_Heaters\"><\/span>What Refrigerant Is Used in Heat Pump Water Heaters?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"auto\" data-start=\"13505\" data-end=\"13600\">Heat-pump water heaters can use different refrigerants depending on the manufacturer and model.<\/p>\n<p dir=\"auto\" data-start=\"13602\" data-end=\"13633\"><strong>Potential refrigerants include:<\/strong><\/p>\n<ul data-start=\"13635\" data-end=\"13722\">\n<li data-section-id=\"5m0fs0\" data-start=\"13635\" data-end=\"13643\">R-134a<\/li>\n<li data-section-id=\"5lwmw3\" data-start=\"13644\" data-end=\"13652\">R-410A<\/li>\n<li data-section-id=\"1j4crjq\" data-start=\"13653\" data-end=\"13659\">R-32<\/li>\n<li data-section-id=\"177vv1o\" data-start=\"13660\" data-end=\"13667\">R-290<\/li>\n<li data-section-id=\"xau75\" data-start=\"13668\" data-end=\"13679\">CO\u2082\/R-744<\/li>\n<li data-section-id=\"nmsxlw\" data-start=\"13680\" data-end=\"13722\">Other manufacturer-specific refrigerants<\/li>\n<\/ul>\n<p dir=\"auto\" data-start=\"13724\" data-end=\"13804\"><strong>For water-heating applications, refrigerant selection is closely connected with:<\/strong><\/p>\n<ul data-start=\"13806\" data-end=\"13945\">\n<li data-section-id=\"fby0go\" data-start=\"13806\" data-end=\"13834\">Required water temperature<\/li>\n<li data-section-id=\"1ah8124\" data-start=\"13835\" data-end=\"13856\">Ambient temperature<\/li>\n<li data-section-id=\"nxbv9d\" data-start=\"13857\" data-end=\"13876\">Compressor design<\/li>\n<li data-section-id=\"vdeht0\" data-start=\"13877\" data-end=\"13895\">Heating capacity<\/li>\n<li data-section-id=\"1o4dlg\" data-start=\"13896\" data-end=\"13901\">COP<\/li>\n<li data-section-id=\"ocnmad\" data-start=\"13902\" data-end=\"13922\">High-side pressure<\/li>\n<li data-section-id=\"69hqot\" data-start=\"13923\" data-end=\"13945\">Storage requirements<\/li>\n<\/ul>\n<p dir=\"auto\" data-start=\"13947\" data-end=\"14207\">VIPUL HVAC&#8217;s current heat-pump offering is designed for hot-water applications and lists water outlet temperatures of <strong data-start=\"14065\" data-end=\"14111\">up to 60\u201380\u00b0C depending on the application<\/strong>, along with air-source and water-source configurations.<\/p>\n<hr data-start=\"14209\" data-end=\"14212\" \/>\n<h2 dir=\"auto\" data-section-id=\"iug5rv\" data-start=\"14214\" data-end=\"14269\"><span class=\"ez-toc-section\" id=\"What_Refrigerant_Is_Best_for_an_Industrial_Heat_Pump\"><\/span>What Refrigerant Is Best for an Industrial Heat Pump?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"auto\" data-start=\"14271\" data-end=\"14340\">There is no single \u201cbest\u201d refrigerant for every industrial heat pump.<\/p>\n<p dir=\"auto\" data-start=\"14342\" data-end=\"14386\"><strong>Industrial refrigerant selection depends on:<\/strong><\/p>\n<ul data-start=\"14388\" data-end=\"14585\">\n<li data-section-id=\"6gihh1\" data-start=\"14388\" data-end=\"14418\">Required heating temperature<\/li>\n<li data-section-id=\"12o4hn0\" data-start=\"14419\" data-end=\"14444\">Heat-source temperature<\/li>\n<li data-section-id=\"yil0yk\" data-start=\"14445\" data-end=\"14455\">Capacity<\/li>\n<li data-section-id=\"4ygclu\" data-start=\"14456\" data-end=\"14472\">Pressure range<\/li>\n<li data-section-id=\"1nsjbqn\" data-start=\"14473\" data-end=\"14495\">Process requirements<\/li>\n<li data-section-id=\"69sjn8\" data-start=\"14496\" data-end=\"14504\">Safety<\/li>\n<li data-section-id=\"k64th4\" data-start=\"14505\" data-end=\"14531\">Refrigerant availability<\/li>\n<li data-section-id=\"iddsbg\" data-start=\"14532\" data-end=\"14560\">Environmental requirements<\/li>\n<li data-section-id=\"iqjbnb\" data-start=\"14561\" data-end=\"14585\">Equipment architecture<\/li>\n<\/ul>\n<p dir=\"auto\" data-start=\"14587\" data-end=\"14628\"><strong>Possible industrial refrigerants include:<\/strong><\/p>\n<ul data-start=\"14630\" data-end=\"14724\">\n<li data-section-id=\"5m0fs0\" data-start=\"14630\" data-end=\"14638\">R-134a<\/li>\n<li data-section-id=\"5lxejl\" data-start=\"14639\" data-end=\"14647\">R-513A<\/li>\n<li data-section-id=\"5lwq5c\" data-start=\"14648\" data-end=\"14656\">R-454B<\/li>\n<li data-section-id=\"177vv1o\" data-start=\"14657\" data-end=\"14664\">R-290<\/li>\n<li data-section-id=\"177vscg\" data-start=\"14665\" data-end=\"14672\">R-744<\/li>\n<li data-section-id=\"177vsbq\" data-start=\"14673\" data-end=\"14680\">R-717<\/li>\n<li data-section-id=\"1d2vr7q\" data-start=\"14681\" data-end=\"14724\">Specialized high-temperature refrigerants<\/li>\n<\/ul>\n<p dir=\"auto\" data-start=\"14726\" data-end=\"14942\">For example, the European Commission lists <strong data-start=\"14769\" data-end=\"14800\">R-717 ammonia and R-744 CO\u2082<\/strong> among options for industrial heat-pump applications, while also listing several HFC\/HFO alternatives.<\/p>\n<hr data-start=\"14944\" data-end=\"14947\" \/>\n<h2 dir=\"auto\" data-section-id=\"1rs4h8w\" data-start=\"14949\" data-end=\"14983\"><span class=\"ez-toc-section\" id=\"Heat_Pump_Refrigerant_and_Safety\"><\/span>Heat Pump Refrigerant and Safety<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"auto\" data-start=\"14985\" data-end=\"15032\">Refrigerant safety classification is important.<\/p>\n<p dir=\"auto\" data-start=\"15034\" data-end=\"15046\"><strong>For example:<\/strong><\/p>\n<h3 dir=\"auto\" data-section-id=\"1hs051y\" data-start=\"15048\" data-end=\"15054\">A1<\/h3>\n<p dir=\"auto\" data-start=\"15056\" data-end=\"15142\">Generally lower toxicity and no flame propagation under the classification conditions.<\/p>\n<p dir=\"auto\" data-start=\"15144\" data-end=\"15152\"><strong>Example:<\/strong><\/p>\n<p dir=\"auto\" data-start=\"15154\" data-end=\"15164\"><strong data-start=\"15154\" data-end=\"15164\">R-410A<\/strong><\/p>\n<h3 dir=\"auto\" data-section-id=\"1xxfbeh\" data-start=\"15166\" data-end=\"15173\">A2L<\/h3>\n<p dir=\"auto\" data-start=\"15175\" data-end=\"15214\">Lower toxicity with lower flammability.<\/p>\n<p dir=\"auto\" data-start=\"15216\" data-end=\"15225\"><strong>Examples:<\/strong><\/p>\n<p dir=\"auto\" data-start=\"15227\" data-end=\"15243\"><strong data-start=\"15227\" data-end=\"15243\">R-32, R-454B<\/strong><\/p>\n<h3 dir=\"auto\" data-section-id=\"1hs051w\" data-start=\"15245\" data-end=\"15251\">A3<\/h3>\n<p dir=\"auto\" data-start=\"15253\" data-end=\"15273\">Higher flammability.<\/p>\n<p dir=\"auto\" data-start=\"15275\" data-end=\"15284\"><strong>Examples:<\/strong><\/p>\n<p dir=\"auto\" data-start=\"15286\" data-end=\"15295\"><strong data-start=\"15286\" data-end=\"15295\">R-290<\/strong><\/p>\n<p dir=\"auto\" data-start=\"15297\" data-end=\"15326\"><strong>These classifications affect:<\/strong><\/p>\n<ul data-start=\"15328\" data-end=\"15467\">\n<li data-section-id=\"1iiozn4\" data-start=\"15328\" data-end=\"15346\">Equipment design<\/li>\n<li data-section-id=\"1t8z4ib\" data-start=\"15347\" data-end=\"15367\">Refrigerant charge<\/li>\n<li data-section-id=\"1tl2ot0\" data-start=\"15368\" data-end=\"15382\">Installation<\/li>\n<li data-section-id=\"1ys04qh\" data-start=\"15383\" data-end=\"15396\">Ventilation<\/li>\n<li data-section-id=\"1b339z8\" data-start=\"15397\" data-end=\"15413\">Leak detection<\/li>\n<li data-section-id=\"15p8j8r\" data-start=\"15414\" data-end=\"15434\">Service procedures<\/li>\n<li data-section-id=\"1llr47s\" data-start=\"15435\" data-end=\"15467\">Applicable codes and standards<\/li>\n<\/ul>\n<p dir=\"auto\" data-start=\"15469\" data-end=\"15614\">The EPA explicitly attaches use conditions to several refrigerants used in AC and heat-pump applications.<\/p>\n<hr data-start=\"15616\" data-end=\"15619\" \/>\n<h2 dir=\"auto\" data-section-id=\"1rht5qr\" data-start=\"15621\" data-end=\"15653\"><span class=\"ez-toc-section\" id=\"Why_Refrigerant_Charge_Matters\"><\/span>Why Refrigerant Charge Matters<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"auto\" data-start=\"15655\" data-end=\"15727\">The quantity of refrigerant inside a heat pump affects system operation.<\/p>\n<p dir=\"auto\" data-start=\"15729\" data-end=\"15762\"><strong>Too little refrigerant can cause:<\/strong><\/p>\n<ul data-start=\"15764\" data-end=\"15876\">\n<li data-section-id=\"1wr1708\" data-start=\"15764\" data-end=\"15782\">Reduced capacity<\/li>\n<li data-section-id=\"14gm9si\" data-start=\"15783\" data-end=\"15805\">Poor heating\/cooling<\/li>\n<li data-section-id=\"wkve80\" data-start=\"15806\" data-end=\"15828\">Low suction pressure<\/li>\n<li data-section-id=\"13mhb63\" data-start=\"15829\" data-end=\"15850\">Compressor problems<\/li>\n<li data-section-id=\"izz7lo\" data-start=\"15851\" data-end=\"15876\">Higher operating stress<\/li>\n<\/ul>\n<p dir=\"auto\" data-start=\"15878\" data-end=\"15914\"><strong>Too much refrigerant can also cause:<\/strong><\/p>\n<ul data-start=\"15916\" data-end=\"16012\">\n<li data-section-id=\"etdz2t\" data-start=\"15916\" data-end=\"15943\">Abnormally high pressures<\/li>\n<li data-section-id=\"1rylagr\" data-start=\"15944\" data-end=\"15964\">Reduced efficiency<\/li>\n<li data-section-id=\"13mhb63\" data-start=\"15965\" data-end=\"15986\">Compressor problems<\/li>\n<li data-section-id=\"xka0pj\" data-start=\"15987\" data-end=\"16012\">Poor system performance<\/li>\n<\/ul>\n<p dir=\"auto\" data-start=\"16014\" data-end=\"16180\">Therefore, refrigerant should be charged according to the <strong data-start=\"16072\" data-end=\"16123\">manufacturer&#8217;s specified procedure and quantity<\/strong>, not simply by adding gas until the system \u201cfeels cold.\u201d<\/p>\n<hr data-start=\"16182\" data-end=\"16185\" \/>\n<h2 dir=\"auto\" data-section-id=\"1n6xdsa\" data-start=\"16187\" data-end=\"16236\"><span class=\"ez-toc-section\" id=\"Heat_Pump_Refrigerant_Leak_What_Should_You_Do\"><\/span>Heat Pump Refrigerant Leak: What Should You Do?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"auto\" data-start=\"16238\" data-end=\"16314\">If a heat pump has a refrigerant leak, don&#8217;t simply keep adding refrigerant.<\/p>\n<p dir=\"auto\" data-start=\"16316\" data-end=\"16349\"><strong>A professional technician should:<\/strong><\/p>\n<ol data-start=\"16351\" data-end=\"16593\">\n<li data-section-id=\"bgh5xa\" data-start=\"16351\" data-end=\"16373\">Inspect the system.<\/li>\n<li data-section-id=\"sjjtwp\" data-start=\"16374\" data-end=\"16395\">Identify the leak.<\/li>\n<li data-section-id=\"1p4bjgx\" data-start=\"16396\" data-end=\"16415\">Repair the leak.<\/li>\n<li data-section-id=\"8q44cv\" data-start=\"16416\" data-end=\"16462\">Perform the required pressure\/leak testing.<\/li>\n<li data-section-id=\"15e3bik\" data-start=\"16463\" data-end=\"16528\">Evacuate the system according to the manufacturer&#8217;s procedure.<\/li>\n<li data-section-id=\"majff7\" data-start=\"16529\" data-end=\"16565\">Charge the specified refrigerant.<\/li>\n<li data-section-id=\"kv5321\" data-start=\"16566\" data-end=\"16593\">Test system performance.<\/li>\n<\/ol>\n<p dir=\"auto\" data-start=\"16595\" data-end=\"16720\">Repeated refrigerant top-ups without repairing the leak can result in poor performance and unnecessary refrigerant emissions.<\/p>\n<p dir=\"auto\" data-start=\"16722\" data-end=\"16871\">The EPA emphasizes responsible handling of refrigerants because releases can have environmental consequences.<\/p>\n<hr data-start=\"16873\" data-end=\"16876\" \/>\n<h2 dir=\"auto\" data-section-id=\"1mg1agx\" data-start=\"16878\" data-end=\"16925\"><span class=\"ez-toc-section\" id=\"Does_Refrigerant_Affect_Heat_Pump_Efficiency\"><\/span>Does Refrigerant Affect Heat Pump Efficiency?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"auto\" data-start=\"16927\" data-end=\"16935\"><strong data-start=\"16927\" data-end=\"16935\">Yes.<\/strong><\/p>\n<p dir=\"auto\" data-start=\"16937\" data-end=\"17017\"><strong>System efficiency depends on many factors, but refrigerant properties influence:<\/strong><\/p>\n<ul data-start=\"17019\" data-end=\"17154\">\n<li data-section-id=\"4yg3v0\" data-start=\"17019\" data-end=\"17035\">Pressure ratio<\/li>\n<li data-section-id=\"ty54s2\" data-start=\"17036\" data-end=\"17053\">Compressor work<\/li>\n<li data-section-id=\"v8dvg8\" data-start=\"17054\" data-end=\"17085\">Heat-transfer characteristics<\/li>\n<li data-section-id=\"rc00a\" data-start=\"17086\" data-end=\"17110\">Operating temperatures<\/li>\n<li data-section-id=\"b4lggq\" data-start=\"17111\" data-end=\"17130\">Expansion process<\/li>\n<li data-section-id=\"12ag3eu\" data-start=\"17131\" data-end=\"17154\">Heat-exchanger design<\/li>\n<\/ul>\n<p dir=\"auto\" data-start=\"17156\" data-end=\"17238\">However, you should not judge a heat pump&#8217;s efficiency from the refrigerant alone.<\/p>\n<p dir=\"auto\" data-start=\"17240\" data-end=\"17335\"><strong>Two systems using the same refrigerant can have different efficiency because of differences in:<\/strong><\/p>\n<ul data-start=\"17337\" data-end=\"17455\">\n<li data-section-id=\"3gp24z\" data-start=\"17337\" data-end=\"17349\">Compressor<\/li>\n<li data-section-id=\"qq6ma2\" data-start=\"17350\" data-end=\"17367\">Heat exchangers<\/li>\n<li data-section-id=\"1kltnwc\" data-start=\"17368\" data-end=\"17378\">Controls<\/li>\n<li data-section-id=\"1j455le\" data-start=\"17379\" data-end=\"17385\">Fans<\/li>\n<li data-section-id=\"174z683\" data-start=\"17386\" data-end=\"17393\">Pumps<\/li>\n<li data-section-id=\"lwgeze\" data-start=\"17394\" data-end=\"17415\">Refrigerant circuit<\/li>\n<li data-section-id=\"1fq9i8c\" data-start=\"17416\" data-end=\"17439\">Part-load performance<\/li>\n<li data-section-id=\"rbvq7z\" data-start=\"17440\" data-end=\"17455\">System design<\/li>\n<\/ul>\n<hr data-start=\"17457\" data-end=\"17460\" \/>\n<h2 dir=\"auto\" data-section-id=\"1tkm6p6\" data-start=\"17462\" data-end=\"17509\"><span class=\"ez-toc-section\" id=\"Does_R-32_Mean_a_Heat_Pump_Is_More_Efficient\"><\/span>Does R-32 Mean a Heat Pump Is More Efficient?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"auto\" data-start=\"17511\" data-end=\"17527\">Not necessarily.<\/p>\n<p dir=\"auto\" data-start=\"17529\" data-end=\"17668\">R-32 has favorable characteristics and a lower GWP than R-410A, but <strong data-start=\"17597\" data-end=\"17667\">overall heat-pump efficiency depends on the complete system design<\/strong>.<\/p>\n<p dir=\"auto\" data-start=\"17670\" data-end=\"17725\"><strong>When comparing heat pumps, evaluate manufacturer-rated:<\/strong><\/p>\n<ul data-start=\"17727\" data-end=\"17834\">\n<li data-section-id=\"1o4dlg\" data-start=\"17727\" data-end=\"17732\">COP<\/li>\n<li data-section-id=\"vdeht0\" data-start=\"17733\" data-end=\"17751\">Heating capacity<\/li>\n<li data-section-id=\"jw9xlf\" data-start=\"17752\" data-end=\"17770\">Cooling capacity<\/li>\n<li data-section-id=\"y4fo8n\" data-start=\"17771\" data-end=\"17792\">Seasonal efficiency<\/li>\n<li data-section-id=\"psz97u\" data-start=\"17793\" data-end=\"17810\">Operating range<\/li>\n<li data-section-id=\"1fq9i8c\" data-start=\"17811\" data-end=\"17834\">Part-load performance<\/li>\n<\/ul>\n<p dir=\"auto\" data-start=\"17836\" data-end=\"17897\">rather than choosing solely from the refrigerant designation.<\/p>\n<hr data-start=\"17899\" data-end=\"17902\" \/>\n<h2 dir=\"auto\" data-section-id=\"a1sv15\" data-start=\"17904\" data-end=\"17952\"><span class=\"ez-toc-section\" id=\"Why_Choose_VIPUL_HVAC_for_Heat_Pump_Solutions\"><\/span>Why Choose VIPUL HVAC for Heat Pump Solutions?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"auto\" data-start=\"17954\" data-end=\"18079\"><strong data-start=\"17954\" data-end=\"17987\">VIPUL HVAC SOLUTION PVT. LTD.<\/strong> provides engineered HVAC solutions for residential, commercial and industrial applications.<\/p>\n<p dir=\"auto\" data-start=\"18081\" data-end=\"18121\"><strong>Its current heat-pump offering includes:<\/strong><\/p>\n<ul data-start=\"18123\" data-end=\"18408\">\n<li data-section-id=\"1rangdt\" data-start=\"18123\" data-end=\"18146\">Air-source heat pumps<\/li>\n<li data-section-id=\"1h9r272\" data-start=\"18147\" data-end=\"18172\">Water-source heat pumps<\/li>\n<li data-section-id=\"1cdfe7p\" data-start=\"18173\" data-end=\"18192\">Hot-water systems<\/li>\n<li data-section-id=\"1ajajw\" data-start=\"18193\" data-end=\"18221\">Hot-water load calculation<\/li>\n<li data-section-id=\"q43szl\" data-start=\"18222\" data-end=\"18241\">Capacity planning<\/li>\n<li data-section-id=\"xhyd32\" data-start=\"18242\" data-end=\"18263\">Storage-tank design<\/li>\n<li data-section-id=\"1jnzs7n\" data-start=\"18264\" data-end=\"18279\">Piping design<\/li>\n<li data-section-id=\"1cetxco\" data-start=\"18280\" data-end=\"18304\">Electrical integration<\/li>\n<li data-section-id=\"ye37zl\" data-start=\"18305\" data-end=\"18326\">Control integration<\/li>\n<li data-section-id=\"1tl2ot0\" data-start=\"18327\" data-end=\"18341\">Installation<\/li>\n<li data-section-id=\"19quzku\" data-start=\"18342\" data-end=\"18351\">Testing<\/li>\n<li data-section-id=\"akz4v9\" data-start=\"18352\" data-end=\"18367\">Commissioning<\/li>\n<li data-section-id=\"itb3bl\" data-start=\"18368\" data-end=\"18394\">Performance optimization<\/li>\n<li data-section-id=\"8gtkh4\" data-start=\"18395\" data-end=\"18408\">AMC support<\/li>\n<\/ul>\n<p dir=\"auto\" data-start=\"18410\" data-end=\"18682\">VIPUL&#8217;s published heat-pump specifications state that the systems use <strong data-start=\"18480\" data-end=\"18509\">eco-friendly refrigerants<\/strong>, with refrigerant selection dependent on the equipment\/application rather than identifying one refrigerant for the entire portfolio.<\/p>\n<p dir=\"auto\" data-start=\"18684\" data-end=\"18826\">For a specific project, the correct refrigerant should always be confirmed from the selected equipment&#8217;s manufacturer datasheet and nameplate.<\/p>\n<p dir=\"auto\" data-start=\"18828\" data-end=\"18914\">\ud83d\udcde <strong data-start=\"18831\" data-end=\"18849\">+91 8000392000<\/strong><br data-start=\"18849\" data-end=\"18852\" \/>\ud83d\udce7 <strong data-start=\"18855\" data-end=\"18884\"><a class=\"decorated-link cursor-pointer\" rel=\"noopener\" data-start=\"18857\" data-end=\"18882\">info@vipulhvacsolution.in<\/a><\/strong><br data-start=\"18884\" data-end=\"18887\" \/>\ud83c\udf10 <a href=\"https:\/\/vipulhvacsolution.in\/\"><strong data-start=\"18890\" data-end=\"18914\">vipulhvacsolution.in<\/strong><\/a><\/p>\n<hr data-start=\"18916\" data-end=\"18919\" \/>\n<h2 dir=\"auto\" data-section-id=\"hkd5a4\" data-start=\"18921\" data-end=\"18949\"><span class=\"ez-toc-section\" id=\"Frequently_Asked_Questions\"><\/span>Frequently Asked Questions<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3 dir=\"auto\" data-section-id=\"m9rf0p\" data-start=\"18951\" data-end=\"18987\">Which gas is used in a heat pump?<\/h3>\n<p dir=\"auto\" data-start=\"18989\" data-end=\"19168\">Heat pumps use refrigerants rather than a single universal \u201cgas.\u201d Common refrigerants include R-32, R-410A, R-454B, R-290, R-134a, R-407C, R-513A and CO\u2082, depending on the system.<\/p>\n<h3 dir=\"auto\" data-section-id=\"10nmuod\" data-start=\"19170\" data-end=\"19200\">Is R-32 used in heat pumps?<\/h3>\n<p dir=\"auto\" data-start=\"19202\" data-end=\"19344\">Yes. R-32 is used in certain residential and light-commercial heat-pump systems and is classified A2L.<\/p>\n<h3 dir=\"auto\" data-section-id=\"52rec8\" data-start=\"19346\" data-end=\"19378\">Is R-410A used in heat pumps?<\/h3>\n<p dir=\"auto\" data-start=\"19380\" data-end=\"19516\">Yes. R-410A has been widely used in residential and light-commercial AC and heat-pump equipment.<\/p>\n<h3 dir=\"auto\" data-section-id=\"yz3wnv\" data-start=\"19518\" data-end=\"19550\">Is R-454B used in heat pumps?<\/h3>\n<p dir=\"auto\" data-start=\"19552\" data-end=\"19716\">Yes. R-454B is a lower-GWP alternative used in certain newer AC and heat-pump equipment, subject to applicable requirements.<\/p>\n<h3 dir=\"auto\" data-section-id=\"17ht83b\" data-start=\"19718\" data-end=\"19749\">Is R-290 used in heat pumps?<\/h3>\n<p dir=\"auto\" data-start=\"19751\" data-end=\"19974\">Yes, in certain self-contained and other appropriately designed heat-pump applications. R-290 is highly flammable and requires equipment and installation designed specifically for it.<\/p>\n<h3 dir=\"auto\" data-section-id=\"gpz6x0\" data-start=\"19976\" data-end=\"20010\">Can I replace R-410A with R-32?<\/h3>\n<p dir=\"auto\" data-start=\"20012\" data-end=\"20146\">Not as a general DIY or service substitution. The heat pump must be specifically designed and approved for the refrigerant being used.<\/p>\n<h3 dir=\"auto\" data-section-id=\"paud23\" data-start=\"20148\" data-end=\"20187\">Can different refrigerants be mixed?<\/h3>\n<p dir=\"auto\" data-start=\"20189\" data-end=\"20293\">No. Do not mix refrigerants unless the equipment manufacturer specifically specifies a particular blend.<\/p>\n<h3 dir=\"auto\" data-section-id=\"cd948d\" data-start=\"20295\" data-end=\"20348\">How do I know which refrigerant my heat pump uses?<\/h3>\n<p dir=\"auto\" data-start=\"20350\" data-end=\"20441\">Check the outdoor-unit nameplate, product manual or manufacturer&#8217;s technical documentation.<\/p>\n<h3 dir=\"auto\" data-section-id=\"11p1hs6\" data-start=\"20443\" data-end=\"20488\">Which refrigerant is best for a heat pump?<\/h3>\n<p dir=\"auto\" data-start=\"20490\" data-end=\"20664\">There is no universal best refrigerant. The appropriate choice depends on the heat-pump design, application, temperature range, capacity, safety requirements and regulations.<\/p>\n<h3 dir=\"auto\" data-section-id=\"q4q1sf\" data-start=\"20666\" data-end=\"20716\">Does VIPUL HVAC provide heat-pump installation?<\/h3>\n<p dir=\"auto\" data-start=\"20718\" data-end=\"20907\">Yes. VIPUL states that it provides heat-pump system selection, capacity planning, installation, testing, commissioning, optimization and AMC support.<\/p>\n<hr data-start=\"20909\" data-end=\"20912\" \/>\n<h2 dir=\"auto\" data-section-id=\"fsb6xx\" data-start=\"20914\" data-end=\"20926\"><span class=\"ez-toc-section\" id=\"Conclusion\"><\/span>Conclusion<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"auto\" data-start=\"20928\" data-end=\"21017\">The answer to <strong data-start=\"20942\" data-end=\"20981\">\u201cWhich gas is used in a heat pump?\u201d<\/strong> is not simply one refrigerant name.<\/p>\n<p dir=\"auto\" data-start=\"21019\" data-end=\"21203\">Modern heat pumps can use different refrigerants, including <strong data-start=\"21079\" data-end=\"21151\">R-32, R-410A, R-454B, R-290, R-134a, R-407C, R-513A, CO\u2082 and ammonia<\/strong>, depending on the application and equipment design.<\/p>\n<p dir=\"auto\" data-start=\"21205\" data-end=\"21232\">The most important rule is:<\/p>\n<blockquote data-start=\"21234\" data-end=\"21307\">\n<p dir=\"auto\" data-start=\"21236\" data-end=\"21307\"><strong data-start=\"21236\" data-end=\"21307\">Always use the refrigerant specified by the heat-pump manufacturer.<\/strong><\/p>\n<\/blockquote>\n<p dir=\"auto\" data-start=\"21309\" data-end=\"21454\">Do not choose a refrigerant based only on its name, GWP or availability, and do not mix or substitute refrigerants without manufacturer approval.<\/p>\n<p dir=\"auto\" data-start=\"21456\" data-end=\"21667\">For residential, commercial or industrial heat-pump projects, proper <strong data-start=\"21525\" data-end=\"21619\">capacity calculation, refrigerant selection, system design, installation and commissioning<\/strong> are essential for safe and efficient operation.<\/p>\n<hr data-start=\"21669\" data-end=\"21672\" \/>\n<h3 dir=\"auto\" data-section-id=\"1os4djr\" data-start=\"22719\" data-end=\"22747\">Suggested Internal Links<\/h3>\n<ul data-start=\"22749\" data-end=\"23021\">\n<li data-section-id=\"18ktts3\" data-start=\"22749\" data-end=\"22782\"><strong data-start=\"22751\" data-end=\"22782\">What Is a Heat Pump System?<\/strong><\/li>\n<li data-section-id=\"142002\" data-start=\"22783\" data-end=\"22819\"><a href=\"https:\/\/vipulhvacsolution.in\/blog\/heat-pump-for-2000-sq-ft-home\/\"><strong data-start=\"22785\" data-end=\"22819\">Heat Pump for 2,000 Sq Ft Home<\/strong><\/a><\/li>\n<li data-section-id=\"yqzsab\" data-start=\"22820\" data-end=\"22859\"><strong data-start=\"22822\" data-end=\"22859\">Which Is Better, AC or Heat Pump?<\/strong><\/li>\n<li data-section-id=\"19utkmw\" data-start=\"22860\" data-end=\"22890\"><strong data-start=\"22862\" data-end=\"22890\">Heat Pump System Diagram<\/strong><\/li>\n<li data-section-id=\"y4hwvf\" data-start=\"22891\" data-end=\"22912\"><a href=\"https:\/\/vipulhvacsolution.in\/chiller-systems\/\"><strong data-start=\"22893\" data-end=\"22912\">Chiller Systems<\/strong><\/a><\/li>\n<li data-section-id=\"21t0h\" data-start=\"22913\" data-end=\"22936\"><a href=\"https:\/\/vipulac.in\/vrf-system\/\" target=\"_blank\" rel=\"noopener\"><strong data-start=\"22915\" data-end=\"22936\">VRF \/ VRV Systems<\/strong><\/a><\/li>\n<li data-section-id=\"86rvxo\" data-start=\"22937\" data-end=\"22964\"><a href=\"https:\/\/vipulhvacsolution.in\/blog\/ahu-supplier-in-india\/\"><strong data-start=\"22939\" data-end=\"22964\">AHU Supplier in India<\/strong><\/a><\/li>\n<li data-section-id=\"1jp6ub5\" data-start=\"22965\" data-end=\"22992\"><a href=\"https:\/\/vipulhvacsolution.in\/bms-hvac-automation\/\"><strong data-start=\"22967\" data-end=\"22992\">BMS &amp; HVAC Automation<\/strong><\/a><\/li>\n<li data-section-id=\"3m9yn4\" data-start=\"22993\" data-end=\"23021\"><a href=\"https:\/\/vipulhvacsolution.in\/hvac-system-maintenance-repair-services\/\"><strong data-start=\"22995\" data-end=\"23021\">HVAC Maintenance &amp; AMC<\/strong><\/a><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Which Gas Is Used in a Heat Pump? Complete Refrigerant Guide If you are asking \u201cWhich gas is used in a heat pump?\u201d, the answer depends on the heat-pump type, application, capacity, manufacturer and model. There is no single refrigerant used in every heat pump. Common refrigerants used in heat-pump systems include R-32, R-410A, R-454B, [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":526,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[14],"tags":[],"class_list":["post-521","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-heat-pump"],"_links":{"self":[{"href":"https:\/\/vipulhvacsolution.in\/blog\/wp-json\/wp\/v2\/posts\/521","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vipulhvacsolution.in\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/vipulhvacsolution.in\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/vipulhvacsolution.in\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/vipulhvacsolution.in\/blog\/wp-json\/wp\/v2\/comments?post=521"}],"version-history":[{"count":4,"href":"https:\/\/vipulhvacsolution.in\/blog\/wp-json\/wp\/v2\/posts\/521\/revisions"}],"predecessor-version":[{"id":524,"href":"https:\/\/vipulhvacsolution.in\/blog\/wp-json\/wp\/v2\/posts\/521\/revisions\/524"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/vipulhvacsolution.in\/blog\/wp-json\/wp\/v2\/media\/526"}],"wp:attachment":[{"href":"https:\/\/vipulhvacsolution.in\/blog\/wp-json\/wp\/v2\/media?parent=521"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vipulhvacsolution.in\/blog\/wp-json\/wp\/v2\/categories?post=521"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vipulhvacsolution.in\/blog\/wp-json\/wp\/v2\/tags?post=521"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}