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      12,000 BTU mini-split heat pump · C series

      ComfortStar CHF12CD(O)

      Very good cooling efficiency and average heating efficiency for a 12,000 BTU mini-split heat pump, and certified for cold climates.

      Ranks #74 of 394 12,000 BTU mini-splits for cooling efficiency, and costs about $291 a year to run in a mixed climate like Atlanta.

      SEER2
      25.5 Cooling efficiency over a season
      Very good · beats 88%
      HSPF2
      10.4 Heating efficiency over a season
      Average · beats 57%
      EER2
      14.0 Cooling efficiency on a 95°F day
      Very good · beats 82%
      Heat at 5°F
      12,100 BTU/h100% of its 47°F output
      Below average · beats 36%

      A good fit if…

      • You want low cooling bills - its SEER2 beats 88% of mini-splits.
      • Your winters get properly cold - it is ENERGY STAR cold-climate certified, with 12,100 BTU/h at 5°F.
      • You want steady temperatures and quiet running - the compressor varies its speed.

      Think twice if…

      • You want the newest refrigerant - it uses R-410A, which is being phased down.

      Calculate my running cost

      Details

      Specifications12,000 BTU, R-410A
      General
      BrandComfortStar
      Outdoor unit modelCHF12CD(O)
      SeriesC series
      TypeMini-split heat pump
      Nominal size12,000 BTU
      CompressorVariable-speed units run longer at low powerContinuously variable
      RefrigerantR-410A
      Connected (smart) capableNo
      On the market sinceFebruary 2, 2020
      Last certifiedJune 25, 2026
      Cooling
      SEER2Seasonal efficiency, higher is better25.5 (range 19.5-25.5)
      EER2Efficiency at 95°F outdoors11.7-14.0
      Cooling capacity12,000 BTU/h
      Heating
      HSPF2Seasonal efficiency, higher is better10.0-10.4
      Capacity at 47°F12,000-12,500 BTU/h
      Capacity at 17°F9,500-10,600 BTU/h
      Capacity at 5°F11,000-12,100 BTU/h
      COP at 5°F2.0 = twice as efficient as a space heater1.80-1.96
      ENERGY STAR cold climateYes
      Heating output as it gets colder100% kept at 5°F

      Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with CHF12CD(I) at the standard test temperatures, in BTU/h:

      Certified matchups6 indoor units

      The same outdoor unit scores differently with each indoor unit. Ask your installer for the AHRI reference number of the exact system you are quoted.

      Indoor unitSEER2EER2HSPF2Heat @5°FAHRI ref.
      CHF12CD(I) COMFORTSTAR · cold climate25.514.010.412,000207658927
      T1W12P COMFORTSTAR · cold climate23.013.010.011,000214594911
      TPA-12 COMFORTSTAR · cold climate22.312.710.211,300207658950
      CPA-12B COMFORTSTAR · cold climate19.511.710.012,100207765970
      CPA-12C COMFORTSTAR · cold climate19.511.710.012,100207658938
      CPA-12C COMFORTSTAR · cold climate19.511.710.012,100207658938
      Yearly running cost in 10 large cities$223-$727

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

      Questions5
      What is the SEER2 rating of the ComfortStar CHF12CD(O)?
      The ComfortStar CHF12CD(O) is rated at up to 25.5 SEER2 and 14.0 EER2 for cooling and up to 10.4 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 6 certified matchups SEER2 ranges from 19.5-25.5.
      Is the ComfortStar CHF12CD(O) good for cold climates?
      Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 12,100 BTU/h at 5°F with a COP of 1.96, so it is still 2.0 times as efficient as electric resistance heat at that temperature.
      How much does the ComfortStar CHF12CD(O) cost to run per year?
      At its rated efficiency it costs about $223-$727 a year in electricity in large U.S. cities, depending on climate and local rates - for example $293 in Phoenix and $621 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 ComfortStar CHF12CD(O)?
      ENERGY STAR lists 6 certified combinations for this outdoor unit. The highest-rated ones use COMFORTSTAR CHF12CD(I), COMFORTSTAR T1W12P, COMFORTSTAR TPA-12.
      What refrigerant does the ComfortStar CHF12CD(O) 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 $300/yrYou save $327/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 ComfortStar CHF12CD(O)
      3. What it replaces
      4. Price replace the example with your quote
      Heat pump, per year
      $300
      Current system, per year
      $627
      You save per year
      $327
      Payback
      13.8 years
      Net after 10 years
      -$1,233

      Cooling $166Heating $135Electricity used: 1,877 kWhSaved vs. a minimum-efficiency heat pump: $182

      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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      Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of June 25, 2026. How we use the data.