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      3-ton central heat pump · XV18I

      Trane 4TWV8X36A1

      Average cooling efficiency and below average heating efficiency for a 3-ton central heat pump, but not rated for cold climates.

      Ranks #116 of 302 3 ton central heat pumps for cooling efficiency, and costs about $983 a year to run in a mixed climate like Atlanta.

      SEER2
      18.0 Cooling efficiency over a season
      Average · beats 66%
      HSPF2
      8.5 Heating efficiency over a season
      Below average · beats 38%
      EER2
      12.0 Cooling efficiency on a 95°F day
      Average · beats 64%
      Heat at 5°F
      21,000 BTU/h65% of its 47°F output
      Below average · beats 25%

      A good fit if…

      • You want steady temperatures and quiet running - the compressor varies its speed.
      • You want a choice of indoor units - 129 certified pairings.

      Think twice if…

      • You often see nights below 0°F - it is not cold-climate certified.
      • You mainly need heat - its HSPF2 is below average for central heat pumps.
      • 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 model4TWV8X36A1
      SeriesXV18I
      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 certifiedJuly 9, 2025
      Cooling
      SEER2Seasonal efficiency, higher is better18.0 (range 17.5-18.0)
      EER2Efficiency at 95°F outdoors11.2-12.2
      Cooling capacity31,800-35,600 BTU/h
      Heating
      HSPF2Seasonal efficiency, higher is better7.8-8.5
      Capacity at 47°F28,800-32,800 BTU/h
      Capacity at 17°F24,200-26,800 BTU/h
      Capacity at 5°F19,200-21,000 BTU/h
      COP at 5°F2.0 = twice as efficient as a space heater1.67-1.91
      ENERGY STAR cold climateNo
      Heating output as it gets colder65% kept at 5°F

      Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with TAMXB0B30V31 at the standard test temperatures, in BTU/h:

      Certified matchups129 indoor units

      The same outdoor unit scores differently with each indoor unit and furnace. The 60 highest-rated of 129 are shown. Ask your installer for the AHRI reference number of the exact system you are quoted.

      Indoor unitFurnaceSEER2EER2HSPF2Heat @5°FAHRI ref.
      TAMXB0B30V31-18.012.08.520,400210929568
      TAMXB0C36V31-18.012.08.520,000210929569
      TEM8A0C42V41+TDR-18.012.08.520,600207526354
      4PX*CU48BS3S9V2C100U4VSA+RP18.012.08.520,400207526469
      4PX*CU48BS3*UD2C100ACV518.012.08.520,400207526260
      4PX*CU48BS3*UD2C080ACV418.012.08.520,200207526257
      TEM8A0C36V31+TDR-18.012.08.520,600207526353
      4PX*CU42BS3S9V2C100U4VSA+RP18.012.08.520,400210653631
      4PX*CU42BS3*UD2C080ACV418.012.08.520,200211596931
      4PX*CU42BS3*UD2C100ACV518.012.08.520,400211289054
      4PX*CU42BS3S9V2C080U5PSC+RP18.012.08.520,400214639993
      4PX*CU48BS3S9V2C080U5PSC+RP18.012.08.520,400214639995
      4TXCB006DS3S9V2B040U3PSC+RP18.012.08.521,000214640007
      4TXCB006DS3S9V2B060U4PSC+RP18.012.08.520,600214640009
      4PX*CU42BS3S9V2C080U5VSB+RP18.012.28.520,400215825873
      4PX*CU48BS3S9V2C080U5VSB+RP18.012.28.520,400215825875
      4PX*BU48BS3S9V2B080D4PSC+RP18.011.28.520,200214639981
      4PX*BU48BS3S9V2B060D3PSC+RP18.011.28.520,200214639983
      4PX*BU48BS3S9V2B040D3PSC+RP18.011.28.520,600214639985
      4PX*CU36BS3S8V2C080M5PCA18.011.78.220,200210691884
      4TXCC005DS3S8V2C080M5PCA18.011.78.220,200210691895
      4TXCB006DS3*UD2B080ACV318.011.78.220,600209459221
      4TXCB006DS3S8V2B060M4PDA18.012.08.220,600211081253
      4PX*CU36BS3S8V2C100M5PDA18.011.78.220,400211081245
      4PX*CU42BS3S8V2C100M5PDA18.012.08.220,400211081247
      4TXCB006DS3S8V2B080M4PDA18.012.08.220,800211081254
      4TXCC005DS3S8V2C100M5PDA18.011.78.220,400211081257
      4TXCC005DS3S8V2C080M5PDA18.011.78.220,200211081256
      4PX*CU48BS3S8V2C100M5PDA18.012.08.220,400211081249
      4PX*CU36BS3S8V2C080M5PDA18.011.78.220,200211081244
      4PX*CU48BS3S8V2C080M5PDA18.012.08.220,200211081248
      4PX*CU42BS3S8V2C080M5PDA18.012.08.220,400211081246
      4TXCC005DS3*UD2C080ACV418.012.08.220,200207526286
      4TXCC005DS3*UD2C100ACV518.011.78.220,400207526288
      4PX*CU36BS3*UD2C100ACV518.011.78.220,200207526256
      4PX*CU36BS3*UD2C080ACV418.012.08.220,000207526255
      4TXCC005DS3S8V2C100M5PCA18.011.78.220,400210691896
      4TXCB006DS3S8V2B060M4PCA18.012.08.220,600210691893
      4TXCB006DS3S8V2B080M4PCA18.012.08.220,800210691894
      4PX*CU42BS3S8V2C100M5PCA18.012.08.220,400210691886
      4PX*CU42BS3S8V2C080M5PCA18.012.08.220,400210691885
      4PX*CU48BS3S8V2C080M5PCA18.012.08.220,200210691888
      4PX*CU36BS3S8V2C100M5PCA18.011.78.220,400210691883
      4PX*CU48BS3S8V2C100M5PCA18.012.08.220,400210691887
      4PX*BU36BS3*UHMB080ACV318.011.78.220,400207526241
      4PX*CU36BS3S9V2C100U4VSA+RP18.011.78.220,400207526468
      4TXCC005DS3S9V2C100U4VSA+RP18.011.78.220,400207526476
      4TXCB006DS3+P0V0B000M40SC+RP-18.012.08.219,800212349460
      4PX*BU36BS3*UHMB060ACV318.011.78.220,600207526244
      4TXCB006DS3L8V1B080U4VSA+RP18.012.08.220,800210653649
      4TXCB004DS3*UHMB060ACV318.011.78.220,600207526281
      4TXCB004DS3*UHMB080ACV318.011.78.220,400207526280
      4TXCB006DS3*UD2B060ACV318.012.08.220,800211596934
      4TXCB006DS3+P0V0B000M40SD+RP-18.012.08.219,800212629965
      4TXCB006DS3L8V1B080U4VSB+RP18.012.08.220,800212629967
      4TXCC005DS3*UHMC100CCV418.012.08.220,200213825962
      4TXCB004DS3*UHMB080CCV318.011.78.220,400213825960
      4PX*BU36BS3*UHMB080CCV318.011.78.220,400214250731
      4PX*BU36BS3*UHMB060CCV318.011.78.220,600214250735
      4PX*CU36BS3*UHMC100CCV418.012.08.220,200214250749
      Yearly running cost in 10 large cities$907-$2,328

      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 4TWV8X36A1?
      The Trane 4TWV8X36A1 is rated at up to 18.0 SEER2 and 12.0 EER2 for cooling and up to 8.5 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 129 certified matchups SEER2 ranges from 17.5-18.0.
      Is the Trane 4TWV8X36A1 good for cold climates?
      It is not cold-climate certified: none of its matchups meet the ENERGY STAR cold-climate criteria (a COP of at least 1.75 at 5°F among other limits). In places with frequent sub-zero nights, pick a cold-climate 3-ton model.
      How much does the Trane 4TWV8X36A1 cost to run per year?
      At its rated efficiency it costs about $907-$2,328 a year in electricity in large U.S. cities, depending on climate and local rates - for example $1,105 in Phoenix and $1,934 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 4TWV8X36A1?
      ENERGY STAR lists 129 certified combinations for this outdoor unit. The highest-rated ones use TAMXB0B30V31, TAMXB0C36V31, TEM8A0C42V41+TDR.
      What refrigerant does the Trane 4TWV8X36A1 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 $1,089/yrYou save $643/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 4TWV8X36A1
      3. What it replaces
      4. Price replace the example with your quote
      Heat pump, per year
      $1,089
      Current system, per year
      $1,732
      You save per year
      $643
      Payback
      20.2 years
      Net after 10 years
      -$6,568

      Cooling $681Heating $408Electricity used: 6,806 kWhSaved vs. a minimum-efficiency heat pump: $231

      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 3 ton models

      See all 302 3 ton central heat pumps, ranked

      Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of July 9, 2025. How we use the data.