HVAC Rated
    Menu

      4-ton central heat pump · 2-STAGE 18 SEER HP

      Carrier GH8TAN548**AA

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

      Ranks #102 of 319 4 ton central heat pumps for cooling efficiency, and costs about $1,498 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
      13.0 Cooling efficiency on a 95°F day
      Very good · beats 89%
      Heat at 5°F
      26,600 BTU/h50% of its 47°F output
      Excellent · beats 90%

      A good fit if…

      • You want a choice of indoor units - 849 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.

      Calculate my running cost

      Details

      Specifications4 ton, R-454B
      General
      BrandCarrier
      Also sold asBryant
      Outdoor unit modelGH8TAN548**AA
      Series2-STAGE 18 SEER HP
      TypeCentral heat pump
      Nominal size4 ton
      CompressorVariable-speed units run longer at low powerTwo-stage
      RefrigerantR-454B
      Connected (smart) capableNo
      On the market sinceNovember 4, 2024
      Last certifiedSeptember 16, 2026
      Cooling
      SEER2Seasonal efficiency, higher is better18.0 (range 15.2-18.0)
      EER2Efficiency at 95°F outdoors11.7-13.5
      Cooling capacity45,500-50,500 BTU/h
      Heating
      HSPF2Seasonal efficiency, higher is better7.8-8.5
      Capacity at 47°F48,500-52,500 BTU/h
      Capacity at 17°F30,000-32,600 BTU/h
      Capacity at 5°F23,800-26,600 BTU/h
      COP at 5°F2.0 = twice as efficient as a space heater2.06-2.32
      ENERGY STAR cold climateNo
      Heating output as it gets colder50% kept at 5°F

      Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with FT5BD6021X at the standard test temperatures, in BTU/h:

      Certified matchups849 indoor units

      The same outdoor unit scores differently with each indoor unit and furnace. The 60 highest-rated of 849 are shown. Ask your installer for the AHRI reference number of the exact system you are quoted.

      Indoor unitFurnaceSEER2EER2HSPF2Heat @5°FAHRI ref.
      FT5BD6021X-18.013.08.525,800218695442
      FT5BD6021X-18.013.08.525,800218695440
      FT5ANBD60L-18.013.58.124,600215560705
      FG5ANBD60L-18.013.58.124,600215560706
      FG5ANBD60L-18.013.58.124,600215560711
      PF5TNBD60L-18.013.58.124,600215560712
      FT5ANBD60L-18.013.58.124,600215560710
      CVAVA6121XMA82*SB66110V21***17.512.58.524,800215625026
      CVAVA6121XMA58SP*B110V21**2217.512.58.524,800215625024
      CVAVA6121XMA58SU*B080M21**2017.513.08.524,400215625056
      CVAVA6121XMA83*SB60080M21***17.513.08.524,400215625058
      CVAVA6121XMA58SU*B100M21**2017.512.58.525,000215625075
      CVAVA6121XMA83*SB60100M21***17.512.58.525,000215625077
      CVAVA6121XMA88*TB60090C21***17.512.08.525,200215625110
      CVAVA6121XMA58TN*B090C21**2017.512.08.525,200215625108
      CVAVA6121XMA58TN*B110C21**2017.512.58.525,000215625122
      CVAVA6121XMA88*TB60110C21***17.512.58.525,000215625124
      CVAVA6124XMA58SP*B135V24**2217.512.58.525,200215625407
      CVAVA6124XMA82*SB66135V24***17.512.58.525,200215625409
      CVAVA6124XMA59SU5B100M21**2217.512.58.525,000215625656
      CVAVA6124XMA935SB66100M21***17.512.58.525,000215625658
      CVAVA6124XMA58TP*B135V24**2217.512.58.525,000215625515
      CVAVA6124XMA82*TB66135V24***17.512.58.525,000215625517
      CVAVA6121XMA59TP6C100V21**2217.512.58.524,600215625368
      CVAVA6121XMA926TC66100V21***17.512.58.524,600215625370
      CVAVA6124XMA58SP*B110V21**2217.512.58.525,000215625394
      CVAVA6124XMA82*SB66110V21***17.512.58.525,000215625396
      CVAVA6124XMA58TN*B135C24**2217.512.58.524,800215625467
      CVAVA6124XMA88*TB66135C24***17.512.58.524,800215625469
      CVAVA6124XMA58TP*B110V21**2217.512.58.524,800215625497
      CVAVA6124XMA82*TB66110V21***17.512.58.524,800215625499
      CVAVA6124XMA59TP6C100V21**2217.512.58.524,800215625748
      CVAVA6124XMA926TC66100V21***17.512.58.524,800215625750
      CVAVA6121XMA927TA66100V21***17.512.58.524,600215722400
      CVAVA6121XMA59TP7A100V21**2217.512.58.524,600215722398
      CVAVA6124XMA927TA66100V21***17.512.58.524,800215722517
      CVAVA6124XMA59TP7A100V21**2217.512.58.524,800215722515
      CVAMA4921XMA58SU*B080M21**2017.512.58.124,400215623309
      CVAMA4921XMA83*SB60080M21***17.512.58.124,400215623311
      CVAMA6021XMA59TP6C100V21**2217.512.58.124,400215624033
      CVAMA6021XMA926TC66100V21***17.512.58.124,400215624035
      CVAMA6021XMA58SU*B080M21**2017.512.58.124,400215623707
      CVAMA6021XMA83*SB60080M21***17.512.58.124,400215623709
      CVAVA4924XMA58SU*B080M21**2017.512.58.124,600215624465
      CVAVA4924XMA83*SB60080M21***17.512.58.124,600215624467
      CVAVA6021XMA59TP6C100V21**2217.512.58.124,400215624998
      CVAVA6021XMA926TC66100V21***17.512.58.124,400215625000
      CVAVA6121XMA58SU*B060M17**1617.512.08.125,000215625037
      CVAVA6121XMA83*SB48060M17***17.512.08.125,000215625039
      CVAVA6121XMA58TP*B110V21**2217.512.58.124,600215625152
      CVAVA6121XMA82*TB66110V21***17.512.58.124,600215625154
      CVAVA6121XMA59SU5B100M21**2217.512.58.124,400215625290
      CVAVA6121XMA935SB66100M21***17.512.58.124,400215625292
      FT5BD4821X-17.512.58.125,400218695425
      FT5BD4821X-17.512.58.125,400218695423
      CVAMA6021XMA927TA66100V21***17.512.58.024,400215722094
      CVAMA6021XMA59TP7A100V21**2217.512.58.024,400215722092
      CVAVA6021XMA927TA66100V21***17.512.58.024,400215722297
      CVAVA6021XMA59TP7A100V21**2217.512.58.024,400215722295
      CVAVA6121XMA58CU*B080C21**2017.512.58.024,800215722308
      Yearly running cost in 10 large cities$1,258-$3,646

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

      Questions5
      What is the SEER2 rating of the Carrier GH8TAN548**AA?
      The Carrier GH8TAN548**AA is rated at up to 18.0 SEER2 and 13.0 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 849 certified matchups SEER2 ranges from 15.2-18.0.
      Is the Carrier GH8TAN548**AA 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 Carrier GH8TAN548**AA cost to run per year?
      At its rated efficiency it costs about $1,258-$3,646 a year in electricity in large U.S. cities, depending on climate and local rates - for example $1,589 in Phoenix and $3,076 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 Carrier GH8TAN548**AA?
      ENERGY STAR lists 849 certified combinations for this outdoor unit. The highest-rated ones use FT5BD6021X, FT5ANBD60L, FG5ANBD60L.
      What refrigerant does the Carrier GH8TAN548**AA 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 $1,597/yrYou save $910/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 Carrier GH8TAN548**AA
      3. What it replaces
      4. Price replace the example with your quote
      Heat pump, per year
      $1,597
      Current system, per year
      $2,508
      You save per year
      $910
      Payback
      19.8 years
      Net after 10 years
      -$8,898

      Cooling $939Heating $659Electricity used: 9,984 kWhSaved vs. a minimum-efficiency heat pump: $331

      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 4 ton models

      See all 319 4 ton central heat pumps, ranked

      Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of September 16, 2026. How we use the data.