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

      Carrier GH8TAN524**AA

      Very good cooling efficiency and below average heating efficiency for a 2-ton central heat pump, but not rated for cold climates.

      Ranks #101 of 331 2 ton central heat pumps for cooling efficiency, and costs about $723 a year to run in a mixed climate like Atlanta.

      SEER2
      18.5 Cooling efficiency over a season
      Very good · beats 77%
      HSPF2
      8.5 Heating efficiency over a season
      Below average · beats 38%
      EER2
      14.0 Cooling efficiency on a 95°F day
      Excellent · beats 98%
      Heat at 5°F
      11,500 BTU/h45% of its 47°F output
      Very good · beats 81%

      A good fit if…

      • You want low cooling bills - its SEER2 beats 77% of central heat pumps.
      • You want a choice of indoor units - 1,121 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

      Specifications2 ton, R-454B
      General
      BrandCarrier
      Also sold asBryant
      Outdoor unit modelGH8TAN524**AA
      Series2-STAGE 18 SEER HP
      TypeCentral heat pump
      Nominal size2 ton
      CompressorVariable-speed units run longer at low powerTwo-stage
      RefrigerantR-454B
      Connected (smart) capableNo
      On the market sinceNovember 4, 2024
      Last certifiedSeptember 15, 2026
      Cooling
      SEER2Seasonal efficiency, higher is better18.5 (range 15.2-18.5)
      EER2Efficiency at 95°F outdoors11.5-14.0
      Cooling capacity22,200-25,000 BTU/h
      Heating
      HSPF2Seasonal efficiency, higher is better7.8-8.5
      Capacity at 47°F24,000-25,400 BTU/h
      Capacity at 17°F14,100-15,000 BTU/h
      Capacity at 5°F10,700-11,500 BTU/h
      COP at 5°F2.0 = twice as efficient as a space heater1.90-2.24
      ENERGY STAR cold climateNo
      Heating output as it gets colder45% kept at 5°F

      Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with CVAVA3817XMA at the standard test temperatures, in BTU/h:

      Certified matchups1,121 indoor units

      The same outdoor unit scores differently with each indoor unit and furnace. The 60 highest-rated of 1,121 are shown. Ask your installer for the AHRI reference number of the exact system you are quoted.

      Indoor unitFurnaceSEER2EER2HSPF2Heat @5°FAHRI ref.
      CVAVA3817XMA83*CA36040C17***18.514.07.811,000215618609
      CVAVA3817XMA58CU*A040C17**1218.514.07.811,000215618607
      CVAMA3217XMA58CU*A040C17**1218.514.07.811,000215614345
      CVAMA3217XMA83*CA36040C17***18.514.07.811,000215614347
      CVAMA3217XMA58SP*B070V14**1218.514.07.810,900215614372
      CVAMA3217XMA82*SB36070V14***18.514.07.810,900215614374
      CVAMA3217XMA58SU*B040M17**1218.514.07.810,800215614411
      CVAMA3217XMA83*SB36040M17***18.514.07.810,800215614413
      CVAMA3217XMA58TP*B070V14**1218.514.07.810,900215614523
      CVAMA3217XMA82*TB36070V14***18.514.07.810,900215614525
      CAA**2517AM58CU*A040C17**1218.013.08.511,300215644361
      CAA**2517AM83*CA36040C17***18.013.08.511,300215644364
      CAA**3721AM58CU*A040C17**1218.013.08.511,300215647747
      CAA**3721AM83*CA36040C17***18.013.08.511,300215647750
      CAA**3721AM58SP*B110V21**2218.013.08.511,100215647826
      CAA**3721AM82*SB66110V21***18.013.08.511,100215647828
      CAA**3721AM58SU*B040M17**1218.013.08.511,100215647845
      CAA**3721AM83*SB36040M17***18.013.08.511,100215647848
      CAA**3721AM58SU*B060M17**1618.013.58.511,200215647869
      CAA**3721AM83*SB48060M17***18.013.58.511,200215647872
      CAA**3721AM58SU*B080M21**2018.013.58.511,100215647893
      CAA**3721AM83*SB60080M21***18.013.58.511,100215647896
      CAA**3721AM82*TB66110V21***18.013.08.511,200215648132
      CAA**3721AM58TP*B110V21**2218.013.08.511,200215648130
      CAA**3721AM59SP6B080V21**2018.013.08.511,200215648374
      CAA**3721AM926SB60080V21***18.013.08.511,200215648377
      CAA**3721AM935SB60100M21***18.013.08.511,200215648491
      CAA**3721AM59SU5B100M21**2018.013.08.511,200215648488
      CAA**3721AM59TP6C080V21**2018.013.08.511,200215648691
      CAA**3721AM926TC60080V21***18.013.08.511,200215648694
      CAA**3721AM59TP6C100V21**2218.013.08.511,200215648740
      CAA**3721AM926TC66100V21***18.013.08.511,200215648743
      CAA**3721AM59TP7A080V21**2018.013.08.511,200215720922
      CAA**3721AM927TA60080V21***18.013.08.511,200215720924
      CAA**3721AM59TP7A100V21**2218.013.08.511,200215720954
      CAA**3721AM927TA66100V21***18.013.08.511,200215720956
      CAA**2517AM82*SB36070V14***18.013.08.111,000215644403
      CAA**2517AM58SP*B070V14**1218.013.08.111,000215644400
      CAA**2517AM82*SB48070V17***18.013.08.111,100215644421
      CAA**2517AM58SP*B070V17**1618.013.08.111,100215644418
      CAA**2517AM83*SB36040M17***18.013.08.111,100215644462
      CAA**2517AM58SU*B040M17**1218.013.08.111,100215644459
      CAA**2517AM58TN*B070C14**1218.013.08.111,100215644536
      CAA**2517AM88*TB36070C14***18.013.08.111,100215644539
      CAA**2517AM58TP*B070V14**1218.013.08.111,000215644624
      CAA**2517AM82*TB36070V14***18.013.08.111,000215644627
      CAA**3721AM82*TB48070V17***18.013.08.111,100215648072
      CAA**3721AM58TP*B070V17**1618.013.08.111,100215648069
      CAA**3721AM82*TB48090V17***18.013.08.111,100215648095
      CAA**3721AM58TP*B090V17**1618.013.08.111,100215648092
      CAA**3721AM82*SB48090V17***18.013.08.111,100215647789
      CAA**3721AM58SP*B090V17**1618.013.08.111,100215647786
      CAA**3721AM58TN*B070C17**1618.013.08.111,100215647968
      CAA**3721AM88*TB48070C17***18.013.08.111,100215647971
      CAA**3721AM58TN*B090C17**1618.013.08.111,100215648007
      CAA**3721AM88*TB48090C17***18.013.08.111,100215648009
      CAA**3721AM59TP6C060V17**1618.013.08.111,200215648642
      CAA**3721AM926TC48060V17***18.013.08.111,200215648647
      CAA**3721AMGG96VTAB48060B**18.013.08.111,200215648644
      CAA**3721AM59SP6B060V17**1618.013.08.111,200215648334
      Yearly running cost in 10 large cities$587-$1,777

      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 GH8TAN524**AA?
      The Carrier GH8TAN524**AA is rated at up to 18.5 SEER2 and 14.0 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 1121 certified matchups SEER2 ranges from 15.2-18.5.
      Is the Carrier GH8TAN524**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 2-ton model.
      How much does the Carrier GH8TAN524**AA cost to run per year?
      At its rated efficiency it costs about $587-$1,777 a year in electricity in large U.S. cities, depending on climate and local rates - for example $753 in Phoenix and $1,507 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 GH8TAN524**AA?
      ENERGY STAR lists 1121 certified combinations for this outdoor unit. The highest-rated ones use CVAVA3817XMA, CVAMA3217XMA, CAA**2517AM.
      What refrigerant does the Carrier GH8TAN524**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 $762/yrYou save $450/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 GH8TAN524**AA
      3. What it replaces
      4. Price replace the example with your quote
      Heat pump, per year
      $762
      Current system, per year
      $1,212
      You save per year
      $450
      Payback
      18.9 years
      Net after 10 years
      -$3,996

      Cooling $438Heating $324Electricity used: 4,761 kWhSaved vs. a minimum-efficiency heat pump: $172

      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 ton models

      See all 331 2 ton central heat pumps, ranked

      Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of September 15, 2026. How we use the data.