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      2.5-ton central heat pump · 17 Multi-Speed Heat Pump with WeatherGuard Top

      Trane 5TWX7036A1

      Average cooling and heating efficiency for a 2.5-ton central heat pump, and certified for cold climates.

      Ranks #46 of 199 2.5 ton central heat pumps for cooling efficiency, and costs about $934 a year to run in a mixed climate like Atlanta.

      SEER2
      18.0 Cooling efficiency over a season
      Average · beats 66%
      HSPF2
      9.4 Heating efficiency over a season
      Average · beats 64%
      EER2
      12.5 Cooling efficiency on a 95°F day
      Very good · beats 80%
      Heat at 5°F
      25,000 BTU/h74% of its 47°F output
      Very good · beats 76%

      A good fit if…

      • Your winters get properly cold - it is ENERGY STAR cold-climate certified, with 25,000 BTU/h at 5°F.
      • You want a choice of indoor units - 519 certified pairings.

      Think twice if…

      • Nothing stands out - its ratings have no weak spot for its class.

      Calculate my running cost

      Details

      Specifications2.5 ton, R-454B
      General
      BrandTrane
      Outdoor unit model5TWX7036A1
      Series17 Multi-Speed Heat Pump with WeatherGuard Top
      TypeCentral heat pump
      Nominal size2.5 ton
      CompressorVariable-speed units run longer at low powerTwo-stage
      RefrigerantR-454B
      Connected (smart) capableNo
      On the market sinceJanuary 15, 2025
      Last certifiedJune 12, 2026
      Cooling
      SEER2Seasonal efficiency, higher is better18.0 (range 15.2-18.0)
      EER2Efficiency at 95°F outdoors11.0-12.7
      Cooling capacity31,400-34,800 BTU/h
      Heating
      HSPF2Seasonal efficiency, higher is better8.1-9.4
      Capacity at 47°F31,400-33,800 BTU/h
      Capacity at 17°F20,800-30,200 BTU/h
      Capacity at 5°F23,600-25,000 BTU/h
      COP at 5°F2.0 = twice as efficient as a space heater1.90-2.20
      ENERGY STAR cold climateYes
      Heating output as it gets colder74% kept at 5°F

      Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with 5TEMCD05AV41+TDR at the standard test temperatures, in BTU/h:

      Certified matchups519 indoor units

      The same outdoor unit scores differently with each indoor unit and furnace. The 60 highest-rated of 519 are shown. Ask your installer for the AHRI reference number of the exact system you are quoted.

      Indoor unitFurnaceSEER2EER2HSPF2Heat @5°FAHRI ref.
      5TEMCD05AV41+TDR · cold climate-18.012.59.424,000216764340
      5PX*C007AS3 · cold climateS9V2C080U5PSC18.012.09.024,200216764291
      5PX*C009AS3 · cold climateS9V2C080U5PSC18.012.59.024,000216764302
      5PX*C009AS3 · cold climateL8V1C100U5VSB18.012.59.023,800216764301
      5PX*D010AS3 · cold climateS9V2D120U5PSC18.012.59.024,000216764328
      5PX*D008AS3 · cold climateS9V2D120U5VSB18.012.09.024,200216764325
      5PX*D008AS3 · cold climateS9V2D120U5PSC18.012.09.024,200216764324
      5TEM6D06AV41+TDR · cold climate-18.012.79.023,800216764336
      5TEM6D07AV51+TDR · cold climate-18.012.79.023,800216764337
      5TEM6D05AV41+TDR · cold climate-18.012.09.024,000216764335
      5PX*D010AS3 · cold climateS9V2D120U5VSB18.012.59.024,000216764330
      5TEMCD07AV51+TDR · cold climate-18.012.79.023,800216764342
      5TEMCD06AV41+TDR · cold climate-18.012.79.023,800216764341
      5TEMCD04AV31+TDR · cold climate-18.012.59.024,000216764339
      5TXCC009AS3 · cold climateL8V1C100U5VSB18.012.59.023,800216764406
      5TXCC007AS3 · cold climateS9V2C080U5PSC18.012.09.024,200216764399
      5TXCD008AS3 · cold climateS9V2D120U5PSC18.012.09.024,200216764412
      5TXCD008AS3 · cold climateS9V2D120U5VSB18.012.09.024,200216764413
      5TXCC009AS3 · cold climateS9V2C080U5PSC18.012.59.024,000216764409
      5TXCD010AS3 · cold climateS9V2D120U5VSB18.012.59.024,000216764418
      5TXCD010AS3 · cold climateS9V2D120U5PSC18.012.59.024,000216764420
      5PX*C009AS3 · cold climateS8X1C080M5PSC18.012.08.724,000216764303
      5PX*CD09AS3 · cold climateS9V2C100D5PSC18.012.08.723,600216764318
      5PX*CD09AS3 · cold climateS9V2C100D4VSB18.012.08.723,600216764319
      5TXCC009AS3 · cold climateS8X1C080M5PSC18.012.08.724,000216764410
      5PX*C009AS3 · cold climateS8X2C080M5PSC18.012.08.724,000216764974
      5PX*C009AS3 · cold climateS8X2C080M5PTC18.012.08.724,000216764975
      5PX*C009AS3 · cold climateS8X1C080M5PTC18.012.08.724,000216764976
      5TXCC009AS3 · cold climateS8X2C080M5PTC18.012.08.724,000216765023
      5TXCC009AS3 · cold climateS8X2C080M5PSC18.012.08.724,000216765022
      5TXCC009AS3 · cold climateS8X1C080M5PTC18.012.08.724,000216765024
      5PX*B006AS3 · cold climateS9V2B040U3VSB17.512.09.024,000216764243
      5PX*B006AS3 · cold climateS9V2B040U3PSC17.512.09.024,000216764244
      5PX*B006AS3 · cold climate*UHMB080CCV317.512.09.024,000216764247
      5PX*B006AS3 · cold climate*UHMB060CCV317.512.09.024,000216764246
      5PX*C007AS3 · cold climateS9V2C100U4VSB17.512.09.024,200216764290
      5PX*C007AS3 · cold climateL8V1C100U5VSB17.512.09.024,200216764296
      5PX*C009AS3 · cold climateS9V2C100U4VSB17.512.09.023,800216764299
      5PX*C007AS3 · cold climateS9V2C100U5PSC17.512.09.024,200216764289
      5PX*C007AS3 · cold climate*UHMC100CCV417.512.09.024,000216764297
      5PX*C009AS3 · cold climateS9V2C100U5PSC17.512.09.023,800216764304
      5PX*C009AS3 · cold climate*UHMC100CCV417.512.59.023,800216764300
      5PX*D010AS3 · cold climate*UHMD120CCV517.512.59.023,800216764329
      5PX*D008AS3 · cold climate*UHMD120CCV517.512.09.024,000216764321
      5PX*D008AS3 · cold climateS8X1D120M5PSC17.512.09.023,800216764323
      5TEM6D04AV31+TDR · cold climate-17.512.09.024,000216764334
      5PX*DD10AS3 · cold climate*DHMD120CCV517.512.09.024,000216764331
      5TXCB006AS3 · cold climateS9V2B040U3PSC17.512.09.024,000216764371
      5TXCB006AS3 · cold climate*UHMB080CCV317.512.09.024,000216764364
      5TXCB006AS3 · cold climate*UHMB060CCV317.512.09.024,000216764365
      5TXCB006AS3 · cold climateS9V2B080U4PSC17.512.09.024,200216764375
      5TXCB006AS3 · cold climateS9V2B080U4VSB17.512.09.024,200216764376
      5TXCB006AS3 · cold climateS9V2B040U3VSB17.512.09.024,000216764372
      5TXCC007AS3 · cold climateL8V1C100U5VSB17.512.09.024,200216764394
      5TXCC007AS3 · cold climate*UHMC100CCV417.512.09.024,000216764393
      5TXCC007AS3 · cold climateS9V2C100U4VSB17.512.09.024,200216764400
      5TXCC009AS3 · cold climate*UHMC100CCV417.512.59.023,800216764405
      5TXCC007AS3 · cold climateS9V2C100U5PSC17.512.09.024,200216764401
      5TXCC009AS3 · cold climateS9V2C100U4VSB17.512.09.023,800216764408
      5TXCD008AS3 · cold climateS8X1D120M5PSC17.512.09.023,800216764414
      Yearly running cost in 10 large cities$860-$2,212

      At each state's average electricity price and the city's typical heating and cooling hours.

      Questions5
      What is the SEER2 rating of the Trane 5TWX7036A1?
      The Trane 5TWX7036A1 is rated at up to 18.0 SEER2 and 12.5 EER2 for cooling and up to 9.4 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 519 certified matchups SEER2 ranges from 15.2-18.0.
      Is the Trane 5TWX7036A1 good for cold climates?
      Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 25,000 BTU/h at 5°F with a COP of 2.20, so it is still 2.2 times as efficient as electric resistance heat at that temperature.
      How much does the Trane 5TWX7036A1 cost to run per year?
      At its rated efficiency it costs about $860-$2,212 a year in electricity in large U.S. cities, depending on climate and local rates - for example $1,048 in Phoenix and $1,839 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.
      Which indoor units work with the Trane 5TWX7036A1?
      ENERGY STAR lists 519 certified combinations for this outdoor unit. The highest-rated ones use 5TEMCD05AV41+TDR, 5PX*C007AS3, 5PX*C009AS3.
      What refrigerant does the Trane 5TWX7036A1 use?
      It uses R-454B.

      Running cost and savings

      Pre-filled with this model. Pick your city and what you heat with today; everything else is optional.

      Heat pump $1,034/yrYou save $661/yrSee details ↓
      1. Where you live
      Adjust heating and cooling hours

      Filled in from your city's climate. Change them if you run the system much more or less than usual.

      2. The heat pump Trane 5TWX7036A1
      3. What it replaces
      4. Price replace the example with your quote
      Heat pump, per year
      $1,034
      Current system, per year
      $1,695
      You save per year
      $661
      Payback
      18.9 years
      Net after 10 years
      -$5,887

      Cooling $645Heating $388Electricity used: 6,461 kWhSaved vs. a minimum-efficiency heat pump: $265

      Estimates use the unit's rated SEER2 and HSPF2, full-load hours derived from NOAA 1991-2020 degree days, average residential electricity prices from the U.S. EIA (12 months to July 2026) and fuel prices from EIA (2025 for natural gas, week of 2026-10-05 for propane and heating oil). Very cold days that need backup heat are not modelled. Federal minimum for comparison: 14.3 SEER2 / 7.5 HSPF2.

      Similar 2.5 ton models

      See all 199 2.5 ton central heat pumps, ranked

      Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of June 12, 2026. How we use the data.