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      1.5-ton central heat pump · 15 Single-Stage Heat Pump

      Trane 5TWR5018A1

      Below average cooling and heating efficiency for a 1.5-ton central heat pump, but not rated for cold climates.

      Ranks #120 of 170 1.5 ton central heat pumps for cooling efficiency, and costs about $607 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
      9,300 BTU/h49% of its 47°F output
      Average · beats 58%

      A good fit if…

      • You want a certified 1.5-ton central heat pump at a typical efficiency level.

      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

      Specifications1.5 ton, R-454B
      General
      BrandTrane
      Also sold asAmerican Standard
      Outdoor unit model5TWR5018A1
      Series15 Single-Stage Heat Pump
      TypeCentral heat pump
      Nominal size1.5 ton
      CompressorVariable-speed units run longer at low powerSingle stage
      RefrigerantR-454B
      Connected (smart) capableNo
      On the market sinceJanuary 25, 2024
      Last certifiedJune 3, 2026
      Cooling
      SEER2Seasonal efficiency, higher is better16.0 (range 15.2-16.0)
      EER2Efficiency at 95°F outdoors11.7-12.0
      Cooling capacity17,800-19,200 BTU/h
      Heating
      HSPF2Seasonal efficiency, higher is better7.8-8.1
      Capacity at 47°F17,200-18,600 BTU/h
      Capacity at 17°F11,200-12,200 BTU/h
      Capacity at 5°F8,600-9,300 BTU/h
      COP at 5°F2.0 = twice as efficient as a space heater1.90-2.10
      ENERGY STAR cold climateNo
      Heating output as it gets colder49% kept at 5°F

      Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with 5TEMCB03AV31+TDR+TSTAT at the standard test temperatures, in BTU/h:

      Certified matchups8 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.
      5TEMCB03AV31+TDR+TSTAT-16.012.08.18,900215863906
      5TXCB004AS3+TSTATL9X1A050U3VSA16.011.77.88,600214078311
      5TEM6B03AV21+TDR+TSTAT-15.212.08.19,200214078309
      5TXCB004AS3+TSTATS9X1B060U4PSB15.212.07.88,900214078313
      5TXCB004AS3+TSTATS9X2B060U4PSB15.212.07.88,900214078315
      5TEM4B02AC21+TDR+TSTAT-15.212.07.89,000215610905
      5TEM6B02AV21+TDR+TSTAT-15.212.07.89,300215610909
      5TEMCB02AV21+TDR+TSTAT-15.212.07.88,900215863904
      Same unit, other model numbers1

      These model numbers have exactly the same certified ratings and matchups as the Trane 5TWR5018A1: the same equipment under another brand, or a variant code for voltage, colour or market. Everything on this page applies to them.

      Yearly running cost in 10 large cities$557-$1,440

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

      Questions6
      What is the SEER2 rating of the Trane 5TWR5018A1?
      The Trane 5TWR5018A1 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 8 certified matchups SEER2 ranges from 15.2-16.0.
      Is the Trane 5TWR5018A1 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 1.5-ton model.
      How much does the Trane 5TWR5018A1 cost to run per year?
      At its rated efficiency it costs about $557-$1,440 a year in electricity in large U.S. cities, depending on climate and local rates - for example $680 in Phoenix and $1,197 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.
      Is the Trane 5TWR5018A1 the same as the American Standard 5A6H5018A1?
      Yes, as far as the certified ratings go. ENERGY STAR lists both model numbers with identical efficiency, capacity and matchups, which means the same outdoor unit sold under a different brand or with a minor variant code (voltage, colour or region). The full list is on this page.
      Which indoor units work with the Trane 5TWR5018A1?
      ENERGY STAR lists 8 certified combinations for this outdoor unit. The highest-rated ones use 5TEMCB03AV31+TDR+TSTAT, 5TXCB004AS3+TSTAT, 5TEM6B03AV21+TDR+TSTAT.
      What refrigerant does the Trane 5TWR5018A1 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 $671/yrYou save $297/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 5TWR5018A1
      3. What it replaces
      4. Price replace the example with your quote
      Heat pump, per year
      $671
      Current system, per year
      $968
      You save per year
      $297
      Payback
      23.6 years
      Net after 10 years
      -$4,028

      Cooling $418Heating $253Electricity used: 4,194 kWhSaved vs. a minimum-efficiency heat pump: $70

      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 1.5 ton models

      See all 170 1.5 ton central heat pumps, ranked

      Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of June 3, 2026. How we use the data.