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      3-ton central heat pump · XV20I

      Trane 4TWV0X36A1

      Excellent cooling efficiency and average heating efficiency for a 3-ton central heat pump, and certified for cold climates.

      Ranks #20 of 302 3 ton central heat pumps for cooling efficiency, and costs about $931 a year to run in a mixed climate like Atlanta.

      SEER2
      20.5 Cooling efficiency over a season
      Excellent · beats 96%
      HSPF2
      8.7 Heating efficiency over a season
      Average · beats 47%
      EER2
      12.7 Cooling efficiency on a 95°F day
      Very good · beats 84%
      Heat at 5°F
      22,400 BTU/h63% of its 47°F output
      Below average · beats 25%

      A good fit if…

      • You want low cooling bills - its SEER2 beats 96% of central heat pumps.
      • Your winters get properly cold - it is ENERGY STAR cold-climate certified, with 22,400 BTU/h at 5°F.
      • You want steady temperatures and quiet running - the compressor varies its speed.
      • You want a choice of indoor units - 210 certified pairings.

      Think twice if…

      • You want the newest refrigerant - it uses R-410A, which is being phased down.

      Calculate my running cost

      Details

      Specifications3 ton, R-410A
      General
      BrandTrane
      Outdoor unit model4TWV0X36A1
      SeriesXV20I
      TypeCentral heat pump
      Nominal size3 ton
      CompressorVariable-speed units run longer at low powerContinuously variable
      RefrigerantR-410A
      Connected (smart) capableNo
      On the market sinceJanuary 1, 2023
      Last certifiedSeptember 24, 2025
      Cooling
      SEER2Seasonal efficiency, higher is better20.5 (range 17.5-20.5)
      EER2Efficiency at 95°F outdoors11.2-12.7
      Cooling capacity32,200-36,000 BTU/h
      Heating
      HSPF2Seasonal efficiency, higher is better8.0-8.7
      Capacity at 47°F29,800-35,400 BTU/h
      Capacity at 17°F24,400-29,000 BTU/h
      Capacity at 5°F19,000-22,400 BTU/h
      COP at 5°F2.0 = twice as efficient as a space heater1.60-1.92
      ENERGY STAR cold climateYes
      Heating output as it gets colder63% kept at 5°F

      Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with 4PX*CU48BS3 at the standard test temperatures, in BTU/h:

      Certified matchups210 indoor units

      The same outdoor unit scores differently with each indoor unit and furnace. The 60 highest-rated of 210 are shown. Ask your installer for the AHRI reference number of the exact system you are quoted.

      Indoor unitFurnaceSEER2EER2HSPF2Heat @5°FAHRI ref.
      4PX*CU48BS3*UD2C080ACV420.512.78.720,200207558973
      4PX*CU48BS3S8V2C100M5PDA20.512.58.720,400211081195
      4PX*CU48BS3S9V2C100U4VSA+RP20.512.78.720,200207526422
      4PX*CU48BS3*UD2C100ACV520.512.78.720,400207558974
      TEM8A0C42V41+TDR-20.512.58.720,200207526340
      TEM8A0C36V31+TDR-20.512.58.720,200207526339
      4PX*CU48BS3S8V2C100M5PCA20.512.58.720,400210691826
      4PX*CU42BS3S9V2C100U4VSA+RP20.512.78.720,200210653495
      4PX*CU42BS3*UD2C080ACV420.512.78.720,200211596901
      4PX*CU48BS3S8V2C100M5PDB20.512.58.720,400214253023
      4PX*CU48BS3S8V2C100M5PCB20.512.58.720,400214253025
      4PX*CU48BS3S9V2C080U5PSC+RP20.512.78.7-214639467
      4TXCC009DS3 · cold climate*UD2C080ACV420.512.78.721,400214655473
      4PX*CD42BS3S9V2C100D4VSA+RP20.512.78.220,000210653492
      4PX*BD42BS3*DD2B060ACV320.512.58.220,600211596891
      4PX*CD42BS3+HORIZ-RT*UD2C080ACV420.512.78.220,000211596900
      4PX*CD42BS3+HORIZ-RT*UD2C100ACV520.512.78.220,400211289038
      4PX*BD42BS3S9V2B080D4VSA+RP20.512.58.120,200210173716
      4PX*CD42BS3*DD2C100ACV520.512.78.120,200207526539
      4PX*BD42BS3S9V2B060D3PSB+RP20.512.58.120,000207526530
      4PX*BD42BS3S9V2B040D3PSB+RP20.512.58.120,200207526528
      4PX*BD42BS3S9V2B080D4PSB+RP20.512.58.120,200207526532
      4PX*BD42BS3S9V2B080D4VSB+RP20.512.58.120,200214638801
      4PX*CD36BS3S9V2C100D4VSA+RP20.512.08.020,400207526419
      4PX*CD36BS3+HORIZ-RT*UD2C080ACV420.512.08.020,400211596899
      TAMXB0B30V31-20.012.58.720,400210929562
      4PX*CU42BS3*UD2C100ACV520.012.78.720,400211289039
      4PX*CU42BS3S9V2C080U5PSC+RP20.012.78.7-214639465
      4PX*BU36BS3S9V2B080U4PSB+RP20.012.08.520,200210610551
      4PX*BU36BS3S9V2B040U3PSB+RP20.012.08.520,400210653469
      4TXCB004DS3S9V2B080U4VSA+RP20.012.08.520,200209326026
      4TXCC005DS3*UD2C100ACV520.012.08.520,400207559001
      4TXCB004DS3*UHMB080ACV320.012.08.520,400207558992
      4TXCC005DS3*UD2C080ACV420.012.08.520,200207559000
      4PX*CU48BS3S8V2C080M5PDA20.012.58.520,400211081196
      4PX*CU42BS3S8V2C100M5PDA20.012.58.520,600211081194
      4PX*BU36BS3*UHMB080ACV320.012.08.520,400207558956
      4PX*BU36BS3S9V2B080U4VSA+RP20.012.08.520,200207526907
      4PX*CU36BS3*UD2C100ACV520.012.08.520,400207558969
      4PX*BU36BS3S9V2B040U3VSA+RP20.012.08.520,400207526415
      4PX*BU36BS3*UHMB060ACV320.012.08.520,400207558960
      4PX*CU36BS3*UD2C080ACV420.012.08.520,200207558971
      4TXCC005DS3S9V2C100U4VSA+RP20.012.08.520,200207526431
      4PX*CU36BS3S9V2C100U4VSA+RP20.012.08.520,200207526421
      4PX*CU42BS3S8V2C100M5PCA20.012.58.520,600210691824
      4PX*CU48BS3S8V2C080M5PCA20.012.58.520,400210691827
      4PX*CU42BS3S8V2C100M5PCB20.012.58.520,600214253017
      4PX*CU42BS3S8V2C100M5PDB20.012.58.520,600214253019
      4PX*CU48BS3S8V2C080M5PCB20.012.58.520,400214253027
      4PX*CU48BS3S8V2C080M5PDB20.012.58.520,400214253029
      4PX*CU36BS3*UHMC100CCV420.012.08.520,200214250651
      4TXCC005DS3*UHMC100CCV420.012.08.520,200214250665
      4TXCB004DS3*UHMB080CCV320.012.08.520,400214250657
      4PX*BU36BS3S9V2B040U3VSB+RP20.012.08.5-214638803
      4PX*BU36BS3S9V2B080U4VSB+RP20.012.08.5-214638805
      4TXCB004DS3S9V2B080U4VSB+RP20.012.08.5-214638821
      4PX*BD42BS3S9V2B080D4PSC+RP20.012.58.5-214639435
      4PX*BD42BS3S9V2B040D3PSC+RP20.012.58.5-214639437
      4PX*BD42BS3+HORIZ-RTS9V2B080U4PSC+RP20.012.58.5-214639439
      4PX*BD42BS3+HORIZ-RTS9V2B060U4PSC+RP20.012.58.5-214639441
      Yearly running cost in 10 large cities$791-$2,259

      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 4TWV0X36A1?
      The Trane 4TWV0X36A1 is rated at up to 20.5 SEER2 and 12.7 EER2 for cooling and up to 8.7 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 210 certified matchups SEER2 ranges from 17.5-20.5.
      Is the Trane 4TWV0X36A1 good for cold climates?
      Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 22,400 BTU/h at 5°F with a COP of 1.92, so it is still 1.9 times as efficient as electric resistance heat at that temperature.
      How much does the Trane 4TWV0X36A1 cost to run per year?
      At its rated efficiency it costs about $791-$2,259 a year in electricity in large U.S. cities, depending on climate and local rates - for example $995 in Phoenix and $1,902 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 4TWV0X36A1?
      ENERGY STAR lists 210 certified combinations for this outdoor unit. The highest-rated ones use 4PX*CU48BS3, TEM8A0C42V41+TDR, TEM8A0C36V31+TDR.
      What refrigerant does the Trane 4TWV0X36A1 use?
      It uses R-410A. R-410A is being phased down under the EPA AIM Act, and new systems are moving to R-454B and R-32.

      Running cost and savings

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

      Heat pump $997/yrYou save $730/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 4TWV0X36A1
      3. What it replaces
      4. Price replace the example with your quote
      Heat pump, per year
      $997
      Current system, per year
      $1,728
      You save per year
      $730
      Payback
      17.8 years
      Net after 10 years
      -$5,695

      Cooling $591Heating $407Electricity used: 6,234 kWhSaved vs. a minimum-efficiency heat pump: $321

      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.

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      Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of September 24, 2025. How we use the data.