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      2-ton central heat pump · SoftSound 20 VS Heat Pump

      Comfortmaker C5H0V24*K*AAA

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

      Ranks #168 of 331 2 ton central heat pumps for cooling efficiency, and costs about $687 a year to run in a mixed climate like Atlanta.

      SEER2
      18.0 Cooling efficiency over a season
      Average · beats 66%
      HSPF2
      9.0 Heating efficiency over a season
      Average · beats 54%
      EER2
      10.5 Cooling efficiency on a 95°F day
      Below average · beats 17%
      Heat at 5°F
      17,300 BTU/h70% of its 47°F output
      Average · beats 47%

      A good fit if…

      • Your winters get properly cold - it is ENERGY STAR cold-climate certified, with 17,300 BTU/h at 5°F.
      • You want steady temperatures and quiet running - the compressor varies its speed.
      • You want a choice of indoor units - 312 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
      BrandComfortmaker
      Also sold asDay & Night, Keeprite
      Outdoor unit modelC5H0V24*K*AAA
      SeriesSoftSound 20 VS 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 12, 2023
      Last certifiedMay 1, 2026
      Cooling
      SEER2Seasonal efficiency, higher is better18.0 (range 15.5-18.0)
      EER2Efficiency at 95°F outdoors9.0-10.5
      Cooling capacity22,400-24,200 BTU/h
      Heating
      HSPF2Seasonal efficiency, higher is better8.5-9.0
      Capacity at 47°F23,200-24,600 BTU/h
      Capacity at 17°F19,600-20,800 BTU/h
      Capacity at 5°F16,300-17,300 BTU/h
      COP at 5°F2.0 = twice as efficient as a space heater1.82-2.02
      ENERGY STAR cold climateYes
      Heating output as it gets colder70% kept at 5°F

      Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with EA*5X37M21A*+WALLCON at the standard test temperatures, in BTU/h:

      Certified matchups312 indoor units

      The same outdoor unit scores differently with each indoor unit and furnace. The 60 highest-rated of 312 are shown. Ask your installer for the AHRI reference number of the exact system you are quoted.

      Indoor unitFurnaceSEER2EER2HSPF2Heat @5°FAHRI ref.
      EA*5X37M21A*+WALLCON · cold climate*80CSU0401712A*18.010.59.016,300215667816
      EA*5X37M21A*+WALLCON · cold climate*80CSU0401712A*18.010.59.016,300215667817
      EA*5X37M21A*+WALLCON · cold climate*80CSU0401712A*18.010.59.016,300215667815
      EA*5X25M17A*+WALLCON · cold climate*80CSU0401712A*17.510.59.016,400215667151
      EA*5X25M17A*+WALLCON · cold climate*80CSU0401712A*17.510.59.016,400215667153
      EA*5X25M17A*+WALLCON · cold climate*80CTL0701412B*17.510.59.016,400215667186
      EA*5X25M17A*+WALLCON · cold climate*80CTL0701412B*17.510.59.016,400215667188
      EA*5X25M17A*+WALLCON · cold climate*80CTL0701412B*17.510.59.016,400215667190
      EA*5X25M17A*+WALLCON · cold climate*80CTL0701716B*17.510.59.016,400215667204
      EA*5X25M17A*+WALLCON · cold climate*80CTL0701716B*17.510.59.016,400215667207
      EA*5X25M17A*+WALLCON · cold climate*80CTL0701716B*17.510.59.016,400215667209
      EA*5X37M17A*+WALLCON · cold climate*80CTL0701412B*17.510.59.016,500215667752
      EA*5X37M17A*+WALLCON · cold climate*80CTL0701412B*17.510.59.016,500215667753
      EA*5X37M21A*+WALLCON · cold climate*80CTL0702120B*17.510.59.016,300215667847
      EA*5X37M21A*+WALLCON · cold climate*80CTL0702120B*17.510.59.016,300215667848
      EA*5X37M21A*+WALLCON · cold climate*80CTL0702120B*17.510.59.016,300215667849
      EA*5X37M21A*+WALLCON · cold climate*80CSU0601716A*17.510.59.016,300215667823
      EA*5X37M21A*+WALLCON · cold climate*80CSU0601716A*17.510.59.016,300215667824
      EA*5X37M21A*+WALLCON · cold climate*80CSU0601716A*17.510.59.016,300215667825
      EA*5X37M21A*+WALLCON · cold climate*96CTN1002122B*17.510.59.016,300215667936
      EA*5X37M21A*+WALLCON · cold climate*96CTN1002122B*17.510.59.016,300215667937
      EA*5X37M21A*+WALLCON · cold climate*96CTN1002122B*17.510.59.016,300215667935
      EA*5X37M21A*+WALLCON · cold climate*97CMN0801714B*17.510.59.016,400215667904
      EA*5X37M21A*+WALLCON · cold climate*97CMN0801714B*17.510.59.016,400215667903
      EA*5X37M21A*+WALLCON · cold climate*97CMN0801714B*17.510.59.016,400215667905
      EA*5X37M21A*+WALLCON · cold climate*80CTL1102120B*17.510.59.016,300215667871
      EA*5X37M21A*+WALLCON · cold climate*80CTL1102120B*17.510.59.016,300215667872
      EA*5X37M21A*+WALLCON · cold climate*80CTL1102120B*17.510.59.016,300215667873
      EA*5X37M21A*+WALLCON · cold climate*96CTN0601714B*17.510.59.016,400215667920
      EA*5X37M21A*+WALLCON · cold climate*96CTN0601714B*17.510.59.016,400215667921
      EA*5X37M21A*+WALLCON · cold climate*96CTN0601714B*17.510.59.016,400215667919
      EA*5X37M21A*+WALLCON · cold climate*96CTN0801714B*17.510.59.016,300215667927
      EA*5X37M21A*+WALLCON · cold climate*96CTN0801714B*17.510.59.016,300215667928
      EA*5X37M21A*+WALLCON · cold climate*96CTN0801714B*17.510.59.016,300215667929
      EA*5X25M17A*+WALLCON · cold climate*80CSU0401712A*17.510.59.016,400215667155
      EA*5X37M17A*+WALLCON · cold climate*80CTL0701412B*17.510.59.016,500215667751
      EA*5X25M17A*+WALLCON · cold climate*80CTL0901716B*17.510.59.016,400215667223
      EA*5X25M17A*+WALLCON · cold climate*80CTL0901716B*17.510.59.016,400215667226
      EA*5X25M17A*+WALLCON · cold climate*80CTL0901716B*17.510.59.016,400215667228
      EA*5X37M21A*+WALLCON · cold climate*80CTL0701716B*17.510.59.016,400215667839
      EA*5X37M21A*+WALLCON · cold climate*80CTL0701716B*17.510.59.016,400215667840
      EA*5X37M21A*+WALLCON · cold climate*80CTL0701716B*17.510.59.016,400215667841
      EA*5X25M17A*+WALLCON · cold climate*96CTN0801714B*17.510.59.016,400215667316
      EA*5X25M17A*+WALLCON · cold climate*96CTN0801714B*17.510.59.016,400215667318
      EA*5X25M17A*+WALLCON · cold climate*96CTN0801714B*17.510.59.016,400215667320
      EA*5X37M21A*+WALLCON · cold climate*80CSU0601716B*17.510.59.016,300215678398
      EA*5X37M21A*+WALLCON · cold climate*80CSU0601716B*17.510.59.016,300215678399
      EA*5X37M21A*+WALLCON · cold climate*80CSU0601716B*17.510.59.016,300215678400
      EA*5X37M21A*+WALLCON · cold climate*80CTL0901716B*17.510.59.016,300215667855
      EA*5X37M21A*+WALLCON · cold climate*80CTL0901716B*17.510.59.016,300215667856
      EA*5X37M21A*+WALLCON · cold climate*80CTL0901716B*17.510.59.016,300215667857
      EA*5X37M21A*+WALLCON · cold climate*80CTL0902120B*17.510.59.016,300215667863
      EA*5X37M21A*+WALLCON · cold climate*80CTL0902120B*17.510.59.016,300215667864
      EA*5X37M21A*+WALLCON · cold climate*80CTL0902120B*17.510.59.016,300215667865
      EA*5X37M21A*+WALLCON · cold climate*97CTN1002122A*17.510.59.016,300215678428
      EA*5X37M21A*+WALLCON · cold climate*97CTN1002122A*17.510.59.016,300215678429
      EA*5X37M21A*+WALLCON · cold climate*97CTN1002122A*17.510.59.016,300215678430
      EA*5X37M21A*+WALLCON · cold climate*97CMN1002122B*17.510.59.016,300215667911
      EA*5X37M21A*+WALLCON · cold climate*97CMN1002122B*17.510.59.016,300215667912
      EA*5X37M21A*+WALLCON · cold climate*97CMN1002122B*17.510.59.016,300215667913
      Yearly running cost in 10 large cities$606-$1,649

      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 C5H0V24*K*AAA?
      The Comfortmaker C5H0V24*K*AAA is rated at up to 18.0 SEER2 and 10.5 EER2 for cooling and up to 9.0 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 312 certified matchups SEER2 ranges from 15.5-18.0.
      Is the Comfortmaker C5H0V24*K*AAA good for cold climates?
      Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 17,300 BTU/h at 5°F with a COP of 2.02, so it is still 2.0 times as efficient as electric resistance heat at that temperature.
      How much does the Comfortmaker C5H0V24*K*AAA cost to run per year?
      At its rated efficiency it costs about $606-$1,649 a year in electricity in large U.S. cities, depending on climate and local rates - for example $751 in Phoenix and $1,381 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 C5H0V24*K*AAA?
      ENERGY STAR lists 312 certified combinations for this outdoor unit. The highest-rated ones use EA*5X37M21A*+WALLCON, EA*5X25M17A*+WALLCON, EA*5X37M17A*+WALLCON.
      What refrigerant does the Comfortmaker C5H0V24*K*AAA 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 $747/yrYou save $455/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 C5H0V24*K*AAA
      3. What it replaces
      4. Price replace the example with your quote
      Heat pump, per year
      $747
      Current system, per year
      $1,203
      You save per year
      $455
      Payback
      18.7 years
      Net after 10 years
      -$3,946

      Cooling $454Heating $294Electricity used: 4,671 kWhSaved vs. a minimum-efficiency heat pump: $176

      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 May 1, 2026. How we use the data.