HVAC Rated
    Menu

      2-ton central heat pump · Crossover heat pump

      Carrier 37MURAQ24AA3+KSAIC0701230

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

      Ranks #274 of 331 2 ton central heat pumps for cooling efficiency, and costs about $715 a year to run in a mixed climate like Atlanta.

      SEER2
      16.0 Cooling efficiency over a season
      Below average · beats 26%
      HSPF2
      9.5 Heating efficiency over a season
      Very good · beats 70%
      EER2
      10.0 Cooling efficiency on a 95°F day
      Below average · beats 10%
      Heat at 5°F
      20,000 BTU/h82% of its 47°F output
      Average · beats 67%

      A good fit if…

      • Your winters get properly cold - it is ENERGY STAR cold-climate certified, with 20,000 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 - 485 certified pairings.

      Think twice if…

      • Cooling cost matters most - its SEER2 is below average for central heat pumps.

      Calculate my running cost

      Details

      Specifications2 ton, R-454B
      General
      BrandCarrier
      Also sold asBryant, PAYNE HEATING AND COOLING, WeatherMaker
      Outdoor unit model37MURAQ24AA3+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 better16.0 (range 15.2-16.0)
      EER2Efficiency at 95°F outdoors9.5-10.0
      Cooling capacity23,200-25,200 BTU/h
      Heating
      HSPF2Seasonal efficiency, higher is better8.5-9.5
      Capacity at 47°F24,000-26,000 BTU/h
      Capacity at 17°F18,300-19,500 BTU/h
      Capacity at 5°F19,000-20,000 BTU/h
      COP at 5°F2.0 = twice as efficient as a space heater1.88-2.14
      ENERGY STAR cold climateYes
      Heating output as it gets colder82% kept at 5°F

      Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with FM(C,U)5Z36**AL at the standard test temperatures, in BTU/h:

      Certified matchups485 indoor units

      The same outdoor unit scores differently with each indoor unit and furnace. The 60 highest-rated of 485 are shown. Ask your installer for the AHRI reference number of the exact system you are quoted.

      Indoor unitFurnaceSEER2EER2HSPF2Heat @5°FAHRI ref.
      FM(C,U)5Z36**AL · cold climate-16.010.09.519,600218475083
      FM(C,U)5Z30**AL · cold climate-16.010.09.519,600218475082
      FM(C,U)5Z36**AL · cold climate-16.010.09.519,600218482269
      FM(C,U)5Z36**AL · cold climate-16.010.09.519,600218482268
      FM(C,U)5Z30**AL · cold climate-16.010.09.519,600218482265
      FM(C,U)5Z30**AL · cold climate-16.010.09.519,600218482263
      FM(C,U)5Z36**AL · cold climate-16.010.09.519,600218816319
      FM(C,U)5Z30**AL · cold climate-16.010.09.519,600218816318
      FMA5X24**AL · cold climate-16.010.09.019,800218475087
      FT5AN(B,X)C36L · cold climate-16.010.09.019,400218475086
      CAA**3721AM · cold climate59SU5B100M21**2216.010.09.019,100218475022
      CAA**3721AM · cold climate59SP6B100V21**2016.010.09.019,100218475005
      CAA**2517AM · cold climate58TP*B090V17**1616.010.09.019,100218474923
      CAA**2517AM · cold climate58SU*B060M17**1616.010.09.019,200218474893
      CAA**3717AM · cold climate58SU*B060M17**1616.010.09.019,200218474892
      CAA**2517AM · cold climate58SP*B090V17**1616.010.09.019,100218474883
      FMA5X24**AL · cold climate-16.010.09.019,800218482295
      FMA5X24**AL · cold climate-16.010.09.019,800218482293
      PF5TNXC36L · cold climate-16.010.09.019,400218482290
      PF5TNXC36L · cold climate-16.010.09.019,400218482288
      FG5ANXC36L · cold climate-16.010.09.019,400218482286
      FT5AN(B,X)C36L · cold climate-16.010.09.019,400218482284
      FG5ANXC36L · cold climate-16.010.09.019,400218482283
      CAA**3721AM · cold climate935SB66100M21***16.010.09.019,100218481993
      CAA**3721AM · cold climate926SB60100V21***16.010.09.019,100218481924
      CAA**2517AM · cold climatePG80VTLB48090B**16.010.09.019,100218481629
      CAA**2517AM · cold climate82*TB48090V17***16.010.09.019,100218481627
      CAA**2517AM · cold climatePG80MSUA48060B**16.010.09.019,200218481498
      CAA**2517AM · cold climate83*SB48060M17***16.010.09.019,200218481496
      CAA**3717AM · cold climatePG80MSUA48060B**16.010.09.019,200218481494
      CAA**3717AM · cold climate83*SB48060M17***16.010.09.019,200218481492
      CAA**2517AM · cold climate82*SB48090V17***16.010.09.019,100218481455
      PF5TNXB24L · cold climate-16.010.09.019,500218814833
      FMA5X24**AL · cold climate-16.010.09.019,800218816323
      PF5TNXC36L · cold climate-16.010.09.019,400218816322
      CAA**2517AM · cold climatePG80VTLB48090B**16.010.09.019,100218816206
      CAA**2517AM · cold climatePG80MSUA48060B**16.010.09.019,200218816177
      CAA**3717AM · cold climatePG80MSUA48060B**16.010.09.019,200218816176
      CSAH*3612AM · cold climate59SU5B100M21**2216.010.08.519,400218475021
      CAA**3721AM · cold climate59SC2E100M21**2016.010.08.519,000218474946
      CAA**3721AM · cold climate58SU*B040M17**1216.010.08.519,000218474888
      CAA**2517AM · cold climate58SU*B040M17**1216.010.08.519,100218474887
      CAA**2517AM · cold climate58S(B,C)*B070M14**1216.010.08.519,100218474837
      CSAH*3612AM · cold climate935SB66100M21***16.010.08.519,400218481990
      CAA**3721AM · cold climatePG92MSAA60100C**16.010.08.519,000218481730
      CAA**3721AM · cold climate912SE60100M21***16.010.08.519,000218481727
      CAA**3721AM · cold climatePG80MSUA36040B**16.010.08.519,000218481476
      CAA**3721AM · cold climate83*SB36040M17***16.010.08.519,000218481474
      CAA**2517AM · cold climatePG80MSUA36040B**16.010.08.519,100218481472
      CAA**2517AM · cold climate83*SB36040M17***16.010.08.519,100218481470
      CAA**2517AM · cold climatePG80MS(A,L)A36070A**16.010.08.519,100218481297
      CAA**2517AM · cold climate8(0,1)*SB36070M14***16.010.08.519,100218481295
      CAA**3721AM · cold climatePG92MSAA60100C**16.010.08.519,000218816229
      CAA**3721AM · cold climatePG80MSUA36040B**16.010.08.519,000218816172
      CAA**2517AM · cold climatePG80MSUA36040B**16.010.08.519,100218816171
      CAA**2517AM · cold climatePG80MS(A,L)A36070A**16.010.08.519,100218816144
      FM(C,U)5S36**AL · cold climate-15.510.09.520,000218609521
      FM(C,U)5S36**AL · cold climate-15.510.09.520,000218609520
      FM(C,U)5S30**AL · cold climate-15.510.09.520,000218609512
      FM(C,U)5S30**AL · cold climate-15.510.09.520,000218609511
      Yearly running cost in 10 large cities$669-$1,654

      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 37MURAQ24AA3+KSAIC0701230?
      The Carrier 37MURAQ24AA3+KSAIC0701230 is rated at up to 16.0 SEER2 and 10.0 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 485 certified matchups SEER2 ranges from 15.2-16.0.
      Is the Carrier 37MURAQ24AA3+KSAIC0701230 good for cold climates?
      Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 20,000 BTU/h at 5°F with a COP of 2.14, so it is still 2.1 times as efficient as electric resistance heat at that temperature.
      How much does the Carrier 37MURAQ24AA3+KSAIC0701230 cost to run per year?
      At its rated efficiency it costs about $669-$1,654 a year in electricity in large U.S. cities, depending on climate and local rates - for example $839 in Phoenix and $1,357 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 37MURAQ24AA3+KSAIC0701230?
      ENERGY STAR lists 485 certified combinations for this outdoor unit. The highest-rated ones use FM(C,U)5Z36**AL, FM(C,U)5Z30**AL, FMA5X24**AL.
      What refrigerant does the Carrier 37MURAQ24AA3+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 $815/yrYou save $429/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 37MURAQ24AA3+KSAIC0701230
      3. What it replaces
      4. Price replace the example with your quote
      Heat pump, per year
      $815
      Current system, per year
      $1,245
      You save per year
      $429
      Payback
      21.0 years
      Net after 10 years
      -$4,708

      Cooling $532Heating $283Electricity used: 5,096 kWhSaved vs. a minimum-efficiency heat pump: $139

      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 October 7, 2026. How we use the data.