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      4-ton central heat pump · XV19

      Trane 4TWL9048A1

      Very good cooling efficiency and average heating efficiency for a 4-ton central heat pump, but not rated for cold climates.

      Ranks #64 of 319 4 ton central heat pumps for cooling efficiency, and costs about $1,269 a year to run in a mixed climate like Atlanta.

      SEER2
      19.0 Cooling efficiency over a season
      Very good · beats 85%
      HSPF2
      9.0 Heating efficiency over a season
      Average · beats 54%
      EER2
      11.7 Cooling efficiency on a 95°F day
      Average · beats 43%
      Heat at 5°F
      - Not reported by the maker

      A good fit if…

      • You want low cooling bills - its SEER2 beats 85% of central heat pumps.
      • You want steady temperatures and quiet running - the compressor varies its speed.
      • You want a choice of indoor units - 10 certified pairings.

      Think twice if…

      • You often see nights below 0°F - it is not cold-climate certified.
      • You want the newest refrigerant - it uses R-410A, which is being phased down.

      Calculate my running cost

      Details

      Specifications4 ton, R-410A
      General
      BrandTrane
      Outdoor unit model4TWL9048A1
      SeriesXV19
      TypeCentral heat pump
      Nominal size4 ton
      CompressorVariable-speed units run longer at low powerContinuously variable
      RefrigerantR-410A
      Connected (smart) capableNo
      On the market sinceJanuary 1, 2023
      Last certifiedDecember 19, 2025
      Cooling
      SEER2Seasonal efficiency, higher is better19.0 (range 19.0)
      EER2Efficiency at 95°F outdoors11.7-12.0
      Cooling capacity47,000-49,000 BTU/h
      Heating
      HSPF2Seasonal efficiency, higher is better8.7-9.0
      Capacity at 47°F42,000-43,500 BTU/h
      Capacity at 17°F30,600-31,800 BTU/h
      Capacity at 5°F-
      COP at 5°F2.0 = twice as efficient as a space heater-
      ENERGY STAR cold climateNo
      Heating output as it gets colder

      Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with 4PX*DU60BS3 at the standard test temperatures, in BTU/h:

      Certified matchups10 indoor units

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

      Indoor unitFurnaceSEER2EER2HSPF2Heat @5°FAHRI ref.
      4PX*DU60BS3S8V2D120M5PCA19.011.79.0-210691769
      4TXCD010DS3S8V2D120M5PCA19.011.79.0-210691778
      4TXCD010DS3P0V0D000M50SC+RP19.012.09.0-206912387
      4TXCD008DS3P0V0D000M50SC+RP19.012.09.0-206912385
      4PX*DD60BS3P0V0D000M50SC+RP19.012.09.0-206912373
      4PX*DU60BS3P0V0D000M50SC+RP19.012.09.0-206912380
      4PX*DU48BS3P0V0D000M50SC+RP19.012.09.0-206912378
      4PX*DU60BS3S8V2C100M5PCA19.011.78.7-210692157
      4TXCD010DS3S8V2C100M5PDA19.011.78.7-211088801
      4TXCD010DS3S8V2C100M5PCA19.011.78.7-210692160
      Yearly running cost in 10 large cities$1,184-$2,991

      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 4TWL9048A1?
      The Trane 4TWL9048A1 is rated at up to 19.0 SEER2 and 11.7 EER2 for cooling and up to 9.0 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with.
      Is the Trane 4TWL9048A1 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 4-ton model.
      How much does the Trane 4TWL9048A1 cost to run per year?
      At its rated efficiency it costs about $1,184-$2,991 a year in electricity in large U.S. cities, depending on climate and local rates - for example $1,436 in Phoenix and $2,480 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 4TWL9048A1?
      ENERGY STAR lists 10 certified combinations for this outdoor unit. The highest-rated ones use 4PX*DU60BS3, 4TXCD010DS3, 4TXCD008DS3.
      What refrigerant does the Trane 4TWL9048A1 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 $1,412/yrYou save $965/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 4TWL9048A1
      3. What it replaces
      4. Price replace the example with your quote
      Heat pump, per year
      $1,412
      Current system, per year
      $2,377
      You save per year
      $965
      Payback
      18.7 years
      Net after 10 years
      -$8,351

      Cooling $889Heating $523Electricity used: 8,825 kWhSaved vs. a minimum-efficiency heat pump: $397

      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 December 19, 2025. How we use the data.