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      2-ton central heat pump · 15 SEER2 HP

      Carrier GH5SAN524**AA

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

      Ranks #257 of 331 2 ton central heat pumps for cooling efficiency, and costs about $721 a year to run in a mixed climate like Atlanta.

      SEER2
      16.5 Cooling efficiency over a season
      Average · beats 40%
      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
      11,900 BTU/h49% of its 47°F output
      Very good · beats 83%

      A good fit if…

      • You want a choice of indoor units - 405 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.
      • Comfort and noise matter - a single-stage compressor runs only full-on or off.

      Calculate my running cost

      Details

      Specifications2 ton, R-454B
      General
      BrandCarrier
      Also sold asBryant
      Outdoor unit modelGH5SAN524**AA
      Series15 SEER2 HP
      TypeCentral heat pump
      Nominal size2 ton
      CompressorVariable-speed units run longer at low powerSingle stage
      RefrigerantR-454B
      Connected (smart) capableNo
      On the market sinceJanuary 1, 2024
      Last certifiedJune 16, 2026
      Cooling
      SEER2Seasonal efficiency, higher is better16.5 (range 15.2-16.5)
      EER2Efficiency at 95°F outdoors11.7-13.0
      Cooling capacity22,200-24,400 BTU/h
      Heating
      HSPF2Seasonal efficiency, higher is better7.8-8.5
      Capacity at 47°F21,600-24,000 BTU/h
      Capacity at 17°F14,200-15,200 BTU/h
      Capacity at 5°F10,800-11,900 BTU/h
      COP at 5°F2.0 = twice as efficient as a space heater1.96-2.26
      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 FMA5X30**AL at the standard test temperatures, in BTU/h:

      Certified matchups405 indoor units

      The same outdoor unit scores differently with each indoor unit and furnace. The 60 highest-rated of 405 are shown. Ask your installer for the AHRI reference number of the exact system you are quoted.

      Indoor unitFurnaceSEER2EER2HSPF2Heat @5°FAHRI ref.
      FMA5X30**AL-16.513.08.511,600214424069
      FMA5X30**AL-16.513.08.511,600214424072
      CAA**3721AM59TP7A100V21**2016.012.58.011,500215800249
      CAA**3721AM927TA60100V21***16.012.58.011,500215800252
      CAA**3721AM59TP7A100V21**2216.013.08.011,400215800277
      CAA**3721AM927TA66100V21***16.013.08.011,400215800280
      CVAVA3117XMA58SP*B090V17**1616.012.07.811,300214205057
      CVAVA3117XMA82*SB48090V17***16.012.07.811,300214205060
      CVAVA3117XMA58TP*B090V17**1616.012.07.811,300214205203
      CVAVA3117XMA82*TB48090V17***16.012.07.811,300214205206
      CVAMA3217XMA58SU*B060M17**1616.012.57.811,300214212733
      CVAMA3217XMA83*SB48060M17***16.012.57.811,300214212736
      CVAVA3817XMA58TP*B070V17**1616.012.07.811,400214214353
      CVAVA3817XMA82*TB48070V17***16.012.07.811,400214214356
      CVAVA3817XMA58TP*B090V17**1616.012.57.811,400214214381
      CVAVA3817XMA82*TB48090V17***16.012.57.811,400214214384
      CVAVA3721XMA58S(B,C)*B090M21**1616.012.07.811,200214213390
      CVAVA3721XMA8(0,1)*SB48090M21***16.012.07.811,200214213393
      CAA**3721AM58CU*A080C21**2016.012.57.811,300214210907
      CAA**3721AM83*CA60080C21***16.012.57.811,300214210910
      CVAMA3217XMA58SP*B090V17**1616.012.07.811,400214212644
      CVAMA3217XMA82*SB48090V17***16.012.07.811,400214212647
      CAA**3721AM59SU5B100M21**2016.012.07.811,500214211965
      CVAVA3817XMA59SC2E060M17**1416.012.07.811,400214214480
      CVAVA3817XMA912SE42060M17***16.012.07.811,400214214483
      CAA**3721AM935SB60100M21***16.012.07.811,500214211968
      CAA**3721AM59TN6B100C21**2216.012.57.811,200214212020
      CAA**3721AM986TC66100C21***16.012.57.811,200214212023
      CVAMA3217XMA58TP*B090V17**1616.012.07.811,400214212889
      CVAMA3217XMA82*TB48090V17***16.012.07.811,400214212892
      CAA**3721AM59TN6C080C21**2016.012.57.811,400214212047
      CAA**3721AM986TD60080C21***16.012.57.811,400214212050
      CAA**3721AM59TN6C100C21**2216.012.57.811,500214212074
      CAA**3721AM986TD66100C21***16.012.57.811,500214212077
      CVAMA3217XMA59SC2E080M17**1616.012.07.811,200214212993
      CVAMA3217XMA912SE48080M17***16.012.07.811,200214212996
      CAA**2517AM58SU*B040M17**1216.012.57.811,300214210525
      CAA**2517AM83*SB36040M17***16.012.57.811,300214210528
      CAA**2517AM58SU*B060M17**1616.012.07.811,200214210557
      CAA**2517AM83*SB48060M17***16.012.07.811,200214210560
      CVAVA3817XMA58S(B,C)*B070M17**1216.012.57.811,400214213970
      CVAVA3817XMA8(0,1)*SB36070M17***16.012.57.811,400214213973
      CAA**3721AM58TN*B090C21**2016.012.57.811,500214211427
      CAA**3721AM88*TB60090C21***16.012.57.811,500214211430
      CVAMA3117XMA58SU*B060M17**1616.012.07.811,200214212345
      CVAMA3117XMA83*SB48060M17***16.012.07.811,200214212348
      CAA**3721AM58TP*B110V21**2216.012.07.811,500214211484
      CAA**3721AM82*TB66110V21***16.012.07.811,500214211487
      CVAVA3817XMA58S(B,C)*B090M17**1416.012.57.811,200214214032
      CVAVA3817XMA8(0,1)*SB42090M17***16.012.57.811,200214214035
      CVAVA3817XMA58S(B,C)*B070M17**1616.012.07.811,400214214000
      CVAVA3817XMA8(0,1)*SB48070M17***16.012.07.811,400214214003
      CAA**2517AM58TN*B070C14**1216.012.57.811,400214210616
      CAA**2517AM88*TB36070C14***16.012.57.811,400214210619
      CAA**3721AM59CU5B100C21**2216.012.57.811,600214211539
      CAA**3721AM935CB66100C21***16.012.57.811,600214211542
      CAA**3721AM59MN7B100C21**2216.012.57.811,200214211566
      CAA**3721AM987MB66100C21***16.012.57.811,200214211569
      CAA**3721AM59MN7C080C21**2016.012.57.811,500214211593
      CAA**3721AM987MC60080C21***16.012.57.811,500214211596
      Yearly running cost in 10 large cities$671-$1,702

      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 GH5SAN524**AA?
      The Carrier GH5SAN524**AA is rated at up to 16.5 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 405 certified matchups SEER2 ranges from 15.2-16.5.
      Is the Carrier GH5SAN524**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 GH5SAN524**AA cost to run per year?
      At its rated efficiency it costs about $671-$1,702 a year in electricity in large U.S. cities, depending on climate and local rates - for example $814 in Phoenix and $1,412 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 GH5SAN524**AA?
      ENERGY STAR lists 405 certified combinations for this outdoor unit. The highest-rated ones use FMA5X30**AL, CAA**3721AM, CVAVA3117XMA.
      What refrigerant does the Carrier GH5SAN524**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 $801/yrYou save $399/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 GH5SAN524**AA
      3. What it replaces
      4. Price replace the example with your quote
      Heat pump, per year
      $801
      Current system, per year
      $1,201
      You save per year
      $399
      Payback
      22.5 years
      Net after 10 years
      -$5,007

      Cooling $503Heating $298Electricity used: 5,008 kWhSaved vs. a minimum-efficiency heat pump: $117

      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 June 16, 2026. How we use the data.