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      2.5-ton central heat pump · SOFTSOUND DELUXE 18 VS HP 2-STAGE

      Comfortmaker CVH837GKA2*+TSTAT

      Average cooling efficiency and below average heating efficiency for a 2.5-ton central heat pump, but not rated for cold climates.

      Ranks #51 of 199 2.5 ton central heat pumps for cooling efficiency, and costs about $1,267 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
      12.0 Cooling efficiency on a 95°F day
      Average · beats 64%
      Heat at 5°F
      24,400 BTU/h51% of its 47°F output
      Below average · beats 31%

      A good fit if…

      • You want a choice of indoor units - 195 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.
      • You want the newest refrigerant - it uses R-410A, which is being phased down.

      Calculate my running cost

      Details

      Specifications2.5 ton, R-410A
      General
      BrandComfortmaker
      Also sold asDay & Night, Keeprite
      Outdoor unit modelCVH837GKA2*+TSTAT
      SeriesSOFTSOUND DELUXE 18 VS HP 2-STAGE
      TypeCentral heat pump
      Nominal size2.5 ton
      CompressorVariable-speed units run longer at low powerTwo-stage
      RefrigerantR-410A
      Connected (smart) capableNo
      On the market sinceMarch 11, 2021
      Last certifiedMay 15, 2025
      Cooling
      SEER2Seasonal efficiency, higher is better18.0 (range 17.0-18.0)
      EER2Efficiency at 95°F outdoors11.7-12.0
      Cooling capacity31,600-33,000 BTU/h
      Heating
      HSPF2Seasonal efficiency, higher is better8.1-8.5
      Capacity at 47°F46,000-48,000 BTU/h
      Capacity at 17°F30,200-31,000 BTU/h
      Capacity at 5°F24,000-24,400 BTU/h
      COP at 5°F2.0 = twice as efficient as a space heater1.94-1.98
      ENERGY STAR cold climateNo
      Heating output as it gets colder51% kept at 5°F

      Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with EN(A,D,W)4X60L24 at the standard test temperatures, in BTU/h:

      Certified matchups195 indoor units

      The same outdoor unit scores differently with each indoor unit and furnace. The 60 highest-rated of 195 are shown. Ask your installer for the AHRI reference number of the exact system you are quoted.

      Indoor unitFurnaceSEER2EER2HSPF2Heat @5°FAHRI ref.
      EN(A,D,W)4X60L24*80VSL0902420A*18.012.08.124,200210464996
      EN(A,D,W)4X60L24*80VSL0902420A*18.012.08.124,200210464997
      EN(A,D,W)4X60L24*80VSL0902420A*18.012.08.124,200210464995
      EN(A,D,W)4X60L24*96VTN1002122A*18.012.08.124,000210464942
      EN(A,D,W)4X60L24*96VTN1002122A*18.012.08.124,000210464941
      EN(A,D,W)4X60L24*96VTN1002122A*18.012.08.124,000210464940
      EA*4X61L24A*96VSN1002120A*18.011.78.124,200210461741
      EA*4X61L21A*80VTL0902120A*18.011.78.124,400210461432
      EA*4X61L24A*96VSN1202422A*18.011.78.124,200210461752
      EA*4X61L24A*96VSN1202422A*18.011.78.124,200210461751
      EA*4X61L24A*96VSN1002120A*18.011.78.124,200210461740
      EA*4X61L24A*96VSN1002120A*18.011.78.124,200210461742
      EA*4X60L24A*96VTN1002122A*18.011.78.124,200210460985
      EA*4X60L24A*96VTN1002122A*18.011.78.124,200210460986
      EA*4X61L21A*80VTL0902120A*18.011.78.124,400210461431
      EA*4X60L24A*96VTN1002122A*18.011.78.124,200210460984
      EA*4X61L21A*80VSL0902120A*18.011.78.124,400210461417
      EA*4X61L21A*80VSL0902120A*18.011.78.124,400210461419
      EA*4X61L21A*96VTN1002122A*18.011.78.124,200210461330
      EA*4X61L21A*96VTN1002122A*18.011.78.124,200210461329
      EA*4X61L21A*80VSL0902120A*18.011.78.124,400210461418
      EA*4X61L24A*96VTN1202422A*18.011.78.124,200210461856
      EA*4X61L24A*96VTN0802120A*18.011.78.124,400210461965
      EA*4X61L24A*80VTL0902120A*18.011.78.124,400210461841
      EA*4X61L21A*80VTL0902120A*18.011.78.124,400210461430
      EA*4X61L21A*96VTN1002122A*18.011.78.124,200210461331
      EA*4X61L24A*96VTN1002120A*18.011.78.124,400210461977
      EA*4X61L24A*96VTN1002120A*18.011.78.124,400210461976
      EA*4X61L24A*96VTN0802120A*18.011.78.124,400210461966
      EA*4X61L24A*96VTN1002120A*18.011.78.124,400210461975
      EA*4X61L24A*96VTN0802120A*18.011.78.124,400210461964
      EA*4X61L24A*80VSL0902120A*18.011.78.124,400210461808
      EA*4X61L24A*96VTN1202422A*18.011.78.124,200210461855
      EA*4X61L24A*80VSL0902120A*18.011.78.124,400210461809
      EA*4X61L24A*96VTN1202422A*18.011.78.124,200210461854
      EA*4X61L24A*80VTL0902120A*18.011.78.124,400210461842
      EA*4X61L24A*80VTL0902120A*18.011.78.124,400210461840
      EA*4X61L24A*80VSL0902120A*18.011.78.124,400210461807
      EA*4X61L24A*96VTN1002122A*18.011.78.124,200210461765
      EA*4X61L24A*96VTN1002122A*18.011.78.124,200210461764
      EA*4X61L24A*96VTN1002122A*18.011.78.124,200210461763
      EA*4X61L24A*96VSN1202422A*18.011.78.124,200210461753
      EA*4X43L21A*96VTN1002122A*17.511.78.524,400210459742
      EA*4X43L21A*96VTN1002122A*17.511.78.524,400210459740
      EA*4X37L21A*96VTN1002122A*17.511.78.524,400210458485
      EA*4X37L21A*96VTN1002122A*17.511.78.524,400210458484
      EA*4X43L21A*96VTN1002122A*17.511.78.524,400210459741
      EA*4X37L21A*96VTN1002122A*17.511.78.524,400210458483
      EA*4X61L24A*80VSL1102422A*17.511.78.524,000210461831
      EA*4X61L24A*80VSL1102422A*17.511.78.524,000210461830
      EA*4X61L24A*80VSL1102422A*17.511.78.524,000210461829
      EN(A,D,W)4X60L24*80VSL0902120A*17.512.08.124,000210464984
      EN(A,D,W)4X60L24*80VSL0902120A*17.512.08.124,000210464985
      EN(A,D,W)4X60L24*80VSL0902120A*17.512.08.124,000210464986
      EN(A,D)4X48L24*80VSL1102422A*17.512.08.124,200210464685
      EN(A,D)4X48L24*80VSL1102422A*17.512.08.124,200210464684
      EN(A,D)4X48L24*80VSL1102422A*17.512.08.124,200210464683
      EN(A,D)4X48L24*96VTN1002122A*17.512.08.124,200210464617
      EN(A,D)4X48L24*96VTN1002122A*17.512.08.124,200210464619
      EN(A,D)4X48L24*96VTN1002122A*17.512.08.124,200210464618
      Yearly running cost in 10 large cities$856-$3,254

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

      Questions5
      What is the SEER2 rating of the Comfortmaker CVH837GKA2*+TSTAT?
      The Comfortmaker CVH837GKA2*+TSTAT is rated at up to 18.0 SEER2 and 12.0 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 195 certified matchups SEER2 ranges from 17.0-18.0.
      Is the Comfortmaker CVH837GKA2*+TSTAT 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 2.5-ton model.
      How much does the Comfortmaker CVH837GKA2*+TSTAT cost to run per year?
      At its rated efficiency it costs about $856-$3,254 a year in electricity in large U.S. cities, depending on climate and local rates - for example $1,189 in Phoenix and $2,822 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 Comfortmaker CVH837GKA2*+TSTAT?
      ENERGY STAR lists 195 certified combinations for this outdoor unit. The highest-rated ones use EN(A,D,W)4X60L24, EA*4X61L24A, EA*4X61L21A.
      What refrigerant does the Comfortmaker CVH837GKA2*+TSTAT use?
      It uses R-410A. R-410A is being phased down under the EPA AIM Act, and new systems are moving to R-454B and R-32.

      Running cost and savings

      Pre-filled with this model. Pick your city and what you heat with today; everything else is optional.

      Heat pump $1,249/yrYou save $653/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 Comfortmaker CVH837GKA2*+TSTAT
      3. What it replaces
      4. Price replace the example with your quote
      Heat pump, per year
      $1,249
      Current system, per year
      $1,902
      You save per year
      $653
      Payback
      18.4 years
      Net after 10 years
      -$5,465

      Cooling $630Heating $619Electricity used: 7,806 kWhSaved vs. a minimum-efficiency heat pump: $245

      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 2.5 ton models

      See all 199 2.5 ton central heat pumps, ranked

      Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of May 15, 2025. How we use the data.