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      2.5-ton central heat pump · 15 Single-Stage Heat Pump with WeatherGuard Top

      Trane 5TWX5030A1

      Below average cooling and heating efficiency for a 2.5-ton central heat pump, but not rated for cold climates.

      Ranks #147 of 199 2.5 ton central heat pumps for cooling efficiency, and costs about $874 a year to run in a mixed climate like Atlanta.

      SEER2
      16.0 Cooling efficiency over a season
      Below average · beats 26%
      HSPF2
      8.1 Heating efficiency over a season
      Below average · beats 20%
      EER2
      12.0 Cooling efficiency on a 95°F day
      Average · beats 64%
      Heat at 5°F
      13,800 BTU/h53% of its 47°F output
      Very good · beats 76%

      A good fit if…

      • You want a choice of indoor units - 125 certified pairings.

      Think twice if…

      • You often see nights below 0°F - it is not cold-climate certified.
      • Cooling cost matters most - its SEER2 is below average for central heat pumps.
      • You mainly need heat - its HSPF2 is below average for central heat pumps.
      • Comfort and noise matter - a single-stage compressor runs only full-on or off.

      Calculate my running cost

      Details

      Specifications2.5 ton, R-454B
      General
      BrandTrane
      Outdoor unit model5TWX5030A1
      Series15 Single-Stage Heat Pump with WeatherGuard Top
      TypeCentral heat pump
      Nominal size2.5 ton
      CompressorVariable-speed units run longer at low powerSingle stage
      RefrigerantR-454B
      Connected (smart) capableNo
      On the market sinceFebruary 1, 2024
      Last certifiedJuly 28, 2026
      Cooling
      SEER2Seasonal efficiency, higher is better16.0 (range 15.2-16.0)
      EER2Efficiency at 95°F outdoors11.7-12.0
      Cooling capacity26,400-29,000 BTU/h
      Heating
      HSPF2Seasonal efficiency, higher is better7.8-8.1
      Capacity at 47°F24,200-26,400 BTU/h
      Capacity at 17°F16,300-17,700 BTU/h
      Capacity at 5°F12,700-13,800 BTU/h
      COP at 5°F2.0 = twice as efficient as a space heater2.00-2.20
      ENERGY STAR cold climateNo
      Heating output as it gets colder53% kept at 5°F

      Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with 5TXCB006AS3+TSTAT at the standard test temperatures, in BTU/h:

      Certified matchups125 indoor units

      The same outdoor unit scores differently with each indoor unit and furnace. The 60 highest-rated of 125 are shown. Ask your installer for the AHRI reference number of the exact system you are quoted.

      Indoor unitFurnaceSEER2EER2HSPF2Heat @5°FAHRI ref.
      5TXCB006AS3+TSTATS8X1A040M3PTC16.012.08.112,900214182180
      5TXCB006AS3+TSTATS8X2A040M3PSC16.012.08.112,900214182191
      5TXCB006AS3+TSTATS8X2A040M3PTC16.012.08.112,900214182193
      5TXCB006AS3+TSTATS8X1A040M3PSC16.012.08.112,900214182280
      5PX*C007AS3+TSTATS8V2C100M5PCB16.012.08.113,600215686642
      5PX*C007AS3+TSTATS8V2C100M5PDB16.012.08.113,600215686648
      5PX*B006AS3+TSTATS8X1A040M3PSC16.012.08.112,700215686517
      5PX*B006AS3+TSTATS8X1A040M3PTC16.012.08.112,700215686518
      5PX*B006AS3+TSTATS8X2A040M3PSC16.012.08.112,700215686523
      5PX*B006AS3+TSTATS8X2A040M3PTC16.012.08.112,700215686524
      5PX*C007AS3+TSTATS9V2C100U5VSB16.012.08.113,400215831652
      5PX*C007AS3+TSTATS9V2C080U5VSB16.012.08.113,500215831653
      5PX*CD07AS3+TSTATS9V2C100D5VSB16.012.08.113,500215831655
      5TXCC007AS3+TSTATS9V2C080U5VSB16.012.08.113,500215831663
      5TXCC007AS3+TSTATS9V2C100U5VSB16.012.08.113,500215831662
      5TEMCD04AV31+TDR+TSTAT-16.012.08.113,300215863972
      5TEMCD05AV41+TDR+TSTAT-16.012.08.113,300215863973
      5TAMXD05AV41+TSTAT-16.012.08.113,300216057030
      5PX*B006AS3+TSTATS9X1B080U4PSB16.012.08.013,700215686548
      5PX*B006AS3+TSTATS9X2B080U4PSB16.012.08.013,700215686551
      5PX*BD06AS3+TSTAT+P0V0B000M40SD-16.012.08.013,600215686598
      5PX*C007AS3+TSTATS9X2C080U5PSB16.012.08.013,300215686639
      5PX*C007AS3+TSTATS9X1C080U5PSB16.012.08.013,300215686640
      5PX*C007AS3+TSTATS9V2C100U5PSC16.012.08.013,400215686641
      5PX*C007AS3+TSTATS9V2C080U5PSC16.012.08.013,500215686643
      5PX*C007AS3+TSTATS9V2C100U4VSB16.012.08.013,400215686649
      5PX*C007AS3+TSTATS8V2C080M5PDB16.012.08.013,500215686650
      5PX*C007AS3+TSTATS8V2C080M5PCB16.012.08.013,500215686651
      5PX*C007AS3+TSTAT*UHMC100CCV416.012.08.013,400215686652
      5PX*CD07AS3+TSTATS9V2C100D5PSC16.012.08.013,500215686673
      5PX*CD07AS3+TSTATS9V2C100D4VSB16.012.08.013,500215686678
      5PX*D008AS3+TSTAT*UHMD120CCV516.012.08.013,400215686688
      5TXCD008AS3+TSTAT*UHMD120CCV516.012.08.013,400215686769
      5PX*B006AS3+TSTATS8X1B060M4PSC16.012.08.013,600215686519
      5PX*B006AS3+TSTATS8X1B060M4PTC16.012.08.013,600215686520
      5PX*B006AS3+TSTATS8X2B060M4PSC16.012.08.013,600215686525
      5PX*B006AS3+TSTATS8X2B060M4PTC16.012.08.013,600215686526
      5PX*B006AS3+TSTAT*UHMB080CCV316.012.08.013,600215686533
      5PX*B006AS3+TSTAT+P0V0B000M40SD-16.012.08.013,500215686541
      5TAMXD06AV41+TSTAT-16.012.08.013,400216057031
      5TEM6D04AV31+TDR+TSTAT-15.512.08.113,700214182013
      5TEM6D07AV51+TDR+TSTAT-15.512.08.113,400214182017
      5TEM6D06AV41+TDR+TSTAT-15.512.08.113,400214182015
      5TXCB006AS3+TSTATS9V2B040U3PSC15.511.78.113,800214182205
      5TXCB006AS3+TSTATS9V2B040U3VSB15.511.78.113,800214182209
      5TXCB006AS3+TSTATS9V2B060U4PSC15.511.78.113,700214182213
      5TXCB006AS3+TSTATS9V2B080U4PSC15.512.08.113,600214182217
      5TXCB006AS3+TSTAT*UHMB080ACV315.512.08.113,100214182223
      5TXCB006AS3+TSTATS9X1B060U4PSB15.511.78.113,600214182229
      5TXCB006AS3+TSTATS9X1B080U4PSB15.512.08.113,600214182238
      5TXCB006AS3+TSTATS9X2B060U4PSB15.511.78.113,600214182242
      5TXCB006AS3+TSTATS9X2B080U4PSB15.512.08.113,600214182248
      5TXCB006AS3+TSTAT*UHMB060CCV315.512.08.113,300214182254
      5TXCC007AS3+TSTATS8X2C080M5PSC15.512.08.113,500214182305
      5TXCC007AS3+TSTATS8X2C080M5PTC15.512.08.113,500214182307
      5TXCC007AS3+TSTATS8X1C080M5PTC15.512.08.113,500214182303
      5TXCC007AS3+TSTATS9V2C080U5PSB15.512.08.113,500214182309
      5TXCC007AS3+TSTATS9V2C080U5PSC15.512.08.113,500214182311
      5TXCC007AS3+TSTATS9V2C100U4VSA15.512.08.113,200214182313
      5TXCC007AS3+TSTATS9V2C100U4VSB15.512.08.113,500214182315
      Yearly running cost in 10 large cities$834-$2,044

      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 5TWX5030A1?
      The Trane 5TWX5030A1 is rated at up to 16.0 SEER2 and 12.0 EER2 for cooling and up to 8.1 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 125 certified matchups SEER2 ranges from 15.2-16.0.
      Is the Trane 5TWX5030A1 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 2.5-ton model.
      How much does the Trane 5TWX5030A1 cost to run per year?
      At its rated efficiency it costs about $834-$2,044 a year in electricity in large U.S. cities, depending on climate and local rates - for example $1,005 in Phoenix and $1,687 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 5TWX5030A1?
      ENERGY STAR lists 125 certified combinations for this outdoor unit. The highest-rated ones use 5TXCB006AS3+TSTAT, 5PX*C007AS3+TSTAT, 5PX*B006AS3+TSTAT.
      What refrigerant does the Trane 5TWX5030A1 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 $983/yrYou save $442/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 5TWX5030A1
      3. What it replaces
      4. Price replace the example with your quote
      Heat pump, per year
      $983
      Current system, per year
      $1,426
      You save per year
      $442
      Payback
      23.7 years
      Net after 10 years
      -$6,076

      Cooling $629Heating $354Electricity used: 6,145 kWhSaved vs. a minimum-efficiency heat pump: $103

      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 July 28, 2026. How we use the data.