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      2-ton central heat pump · Crossover Heat Pump

      Carrier 37MUHAQ24AA3+KSAIC0701230

      Average cooling efficiency and very good heating efficiency for a 2-ton central heat pump, and certified for cold climates.

      Ranks #162 of 331 2 ton central heat pumps for cooling efficiency, and costs about $649 a year to run in a mixed climate like Atlanta.

      SEER2
      18.0 Cooling efficiency over a season
      Average · beats 66%
      HSPF2
      9.5 Heating efficiency over a season
      Very good · beats 70%
      EER2
      11.0 Cooling efficiency on a 95°F day
      Below average · beats 23%
      Heat at 5°F
      20,600 BTU/h83% of its 47°F output
      Average · beats 51%

      A good fit if…

      • Your winters get properly cold - it is ENERGY STAR cold-climate certified, with 20,600 BTU/h at 5°F.
      • It will heat most of the year - its HSPF2 beats 70% of central heat pumps.
      • You want steady temperatures and quiet running - the compressor varies its speed.
      • You want a choice of indoor units - 1,831 certified pairings.

      Think twice if…

      • Nothing stands out - its ratings have no weak spot for its class.

      Calculate my running cost

      Details

      Specifications2 ton, R-454B
      General
      BrandCarrier
      Also sold asBryant, PAYNE HEATING AND COOLING, WeatherMaker
      Outdoor unit model37MUHAQ24AA3+KSAIC0701230
      SeriesCrossover Heat Pump
      TypeCentral heat pump
      Nominal size2 ton
      CompressorVariable-speed units run longer at low powerContinuously variable
      RefrigerantR-454B
      Connected (smart) capableNo
      On the market sinceJune 27, 2024
      Last certifiedOctober 7, 2026
      Cooling
      SEER2Seasonal efficiency, higher is better18.0 (range 15.2-18.0)
      EER2Efficiency at 95°F outdoors10.0-11.0
      Cooling capacity22,600-25,000 BTU/h
      Heating
      HSPF2Seasonal efficiency, higher is better8.1-9.5
      Capacity at 47°F22,200-25,800 BTU/h
      Capacity at 17°F16,800-18,700 BTU/h
      Capacity at 5°F18,700-20,600 BTU/h
      COP at 5°F2.0 = twice as efficient as a space heater1.85-2.06
      ENERGY STAR cold climateYes
      Heating output as it gets colder83% kept at 5°F

      Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with FT5AN(B,X)C36L at the standard test temperatures, in BTU/h:

      Certified matchups1,831 indoor units

      The same outdoor unit scores differently with each indoor unit and furnace. The 60 highest-rated of 1,831 are shown. Ask your installer for the AHRI reference number of the exact system you are quoted.

      Indoor unitFurnaceSEER2EER2HSPF2Heat @5°FAHRI ref.
      FT5AN(B,X)C36L · cold climate-18.011.09.019,000218473794
      CAA**2517AM · cold climate58SU*B060M17**1618.011.09.019,100218473497
      CAA**2517AM · cold climatePG80MSUA48060B**18.011.09.019,100218476793
      CAA**2517AM · cold climate83*SB48060M17***18.011.09.019,100218476792
      FG5ANXC36L · cold climate-18.011.09.019,000218476015
      PF5TNXC36L · cold climate-18.011.09.019,000218477257
      PF5TNXC36L · cold climate-18.011.09.019,000218477256
      FG5ANXC36L · cold climate-18.011.09.019,000218477255
      FT5AN(B,X)C36L · cold climate-18.011.09.019,000218477254
      PF5TNXC36L · cold climate-18.011.09.019,000218815410
      CAA**2517AM · cold climatePG80MSUA48060B**18.011.09.019,100218815242
      CAA**2517AM · cold climate58TP*B045V14**1218.011.08.518,900218473498
      CAA**2517AM · cold climate58SP*B045V14**1218.011.08.518,900218473492
      CAA**2517AM · cold climatePG80VTLB36045A**18.011.08.518,900218476795
      CAA**2517AM · cold climate82*TB36045V14***18.011.08.518,900218476794
      CAA**2517AM · cold climate82*SB36045V14***18.011.08.518,900218476786
      CAA**2517AM · cold climatePG80VTLB36045A**18.011.08.518,900218815243
      FT5ANXB24L · cold climate-17.511.09.519,000218473011
      PF5TNXB24L · cold climate-17.511.09.519,000218475374
      FT5ANXB24L · cold climate-17.511.09.519,000218475373
      PF5TNXB24L · cold climate-17.511.09.519,000218476021
      FG5ANXB24L · cold climate-17.511.09.519,000218476019
      FG5ANXB24L · cold climate-17.511.09.519,000218476017
      CAA**3721AM · cold climate59SU5B100M21**2217.511.09.019,000218473629
      CAA**3717AM · cold climate58SU*B060M17**1617.511.09.019,200218473586
      CAA**3717AM · cold climate58SP*B070V17**1617.511.09.019,300218473583
      CAA**2517AM · cold climate58TP*B070V14**1217.511.09.019,000218473499
      CAA**2517AM · cold climate58SP*B070V14**1217.511.09.019,000218473493
      FMA5X24**AL · cold climate-17.511.09.019,000218473456
      FM(C,U)5Z36**AL · cold climate-17.511.09.019,000218473453
      FM(C,U)5Z30**AL · cold climate-17.511.09.019,000218473452
      CAA**3721AM · cold climate935SB66100M21***17.511.09.019,000218476999
      CAA**3717AM · cold climatePG80MSUA48060B**17.511.09.019,200218476931
      CAA**3717AM · cold climate83*SB48060M17***17.511.09.019,200218476930
      CAA**3717AM · cold climate82*SB48070V17***17.511.09.019,300218476926
      CAA**2517AM · cold climatePG80VTLB36070A**17.511.09.019,000218476797
      CAA**2517AM · cold climate82*TB36070V14***17.511.09.019,000218476796
      CAA**2517AM · cold climate82*SB36070V14***17.511.09.019,000218476787
      FMA5X24**AL · cold climate-17.511.09.019,000218476731
      FMA5X24**AL · cold climate-17.511.09.019,000218476730
      FM(C,U)5Z36**AL · cold climate-17.511.09.019,000218476725
      FM(C,U)5Z36**AL · cold climate-17.511.09.019,000218476724
      FM(C,U)5Z30**AL · cold climate-17.511.09.019,000218476723
      FM(C,U)5Z30**AL · cold climate-17.511.09.019,000218476722
      CAA**3717AM · cold climatePG80MSUA48060B**17.511.09.019,200218815291
      CAA**2517AM · cold climatePG80VTLB36070A**17.511.09.019,000218815244
      FMA5X24**AL · cold climate-17.511.09.019,000218815221
      FM(C,U)5Z36**AL · cold climate-17.511.09.019,000218815218
      FM(C,U)5Z30**AL · cold climate-17.511.09.019,000218815217
      CAA**3721AM · cold climate59SU5B100M21**2017.511.08.518,800218473628
      CAA**3721AM · cold climate58SU*B040M17**1217.511.08.518,800218473612
      CAA**3717AM · cold climate58TP*B070V14**1217.511.08.519,100218473588
      CAA**3717AM · cold climate58TP*B045V14**1217.511.08.519,100218473587
      CAA**3717AM · cold climate58SP*B070V14**1217.511.08.519,100218473582
      CAA**3717AM · cold climate58SP*B045V14**1217.511.08.519,100218473581
      CAA**3617AM · cold climate58TP*B070V14**1217.510.58.519,400218473561
      CAA**3617AM · cold climate58SU*B060M17**1617.510.58.519,300218473559
      CAA**3617AM · cold climate58SU*B040M17**1217.510.58.519,400218473558
      CAA**3617AM · cold climate58SP*B070V14**1217.510.58.519,400218473555
      CAA**3017AM · cold climate58TP*B070V14**1217.510.58.519,500218473534
      Yearly running cost in 10 large cities$609-$1,528

      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 37MUHAQ24AA3+KSAIC0701230?
      The Carrier 37MUHAQ24AA3+KSAIC0701230 is rated at up to 18.0 SEER2 and 11.0 EER2 for cooling and up to 9.5 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 1831 certified matchups SEER2 ranges from 15.2-18.0.
      Is the Carrier 37MUHAQ24AA3+KSAIC0701230 good for cold climates?
      Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 20,600 BTU/h at 5°F with a COP of 2.06, so it is still 2.1 times as efficient as electric resistance heat at that temperature.
      How much does the Carrier 37MUHAQ24AA3+KSAIC0701230 cost to run per year?
      At its rated efficiency it costs about $609-$1,528 a year in electricity in large U.S. cities, depending on climate and local rates - for example $737 in Phoenix and $1,266 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 37MUHAQ24AA3+KSAIC0701230?
      ENERGY STAR lists 1831 certified combinations for this outdoor unit. The highest-rated ones use FT5AN(B,X)C36L, CAA**2517AM, FG5ANXC36L.
      What refrigerant does the Carrier 37MUHAQ24AA3+KSAIC0701230 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 $724/yrYou save $469/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 37MUHAQ24AA3+KSAIC0701230
      3. What it replaces
      4. Price replace the example with your quote
      Heat pump, per year
      $724
      Current system, per year
      $1,193
      You save per year
      $469
      Payback
      19.2 years
      Net after 10 years
      -$4,306

      Cooling $458Heating $266Electricity used: 4,525 kWhSaved vs. a minimum-efficiency heat pump: $189

      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.

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      See all 331 2 ton central heat pumps, ranked

      Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of October 7, 2026. How we use the data.