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      2.5-ton central heat pump · D5F Series

      Arcoaire D5CSHAH33AAK

      Excellent cooling and heating efficiency for a 2.5-ton central heat pump, and certified for cold climates.

      Ranks #12 of 199 2.5 ton central heat pumps for cooling efficiency, and costs about $882 a year to run in a mixed climate like Atlanta.

      SEER2
      19.6 Cooling efficiency over a season
      Excellent · beats 92%
      HSPF2
      10.5 Heating efficiency over a season
      Excellent · beats 96%
      EER2
      12.0 Cooling efficiency on a 95°F day
      Average · beats 64%
      Heat at 5°F
      35,000 BTU/h97% of its 47°F output
      Below average · beats 39%

      A good fit if…

      • You want low cooling bills - its SEER2 beats 92% of central heat pumps.
      • Your winters get properly cold - it is ENERGY STAR cold-climate certified, with 35,000 BTU/h at 5°F.
      • It will heat most of the year - its HSPF2 beats 96% of central heat pumps.
      • You want steady temperatures and quiet running - the compressor varies its speed.

      Think twice if…

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

      Calculate my running cost

      Details

      Specifications2.5 ton, R-454B
      General
      BrandArcoaire
      Also sold asComfortmaker, Day & Night, Heil, Keeprite, Kenmore, Midea, Tempstar, Smart Comfort, Airquest, LPS Legacy, Viessmann, Grandaire
      Outdoor unit modelD5CSHAH33AAK
      SeriesD5F Series
      TypeCentral heat pump
      Nominal size2.5 ton
      CompressorVariable-speed units run longer at low powerContinuously variable
      RefrigerantR-454B
      Connected (smart) capableNo
      On the market sinceNovember 15, 2018
      Last certifiedSeptember 22, 2026
      Cooling
      SEER2Seasonal efficiency, higher is better19.6 (range 16.7-19.6)
      EER2Efficiency at 95°F outdoors11.7-12.0
      Cooling capacity33,000 BTU/h
      Heating
      HSPF2Seasonal efficiency, higher is better10.0-10.5
      Capacity at 47°F35,000-36,000 BTU/h
      Capacity at 17°F27,400-32,000 BTU/h
      Capacity at 5°F34,000-35,000 BTU/h
      COP at 5°F2.0 = twice as efficient as a space heater1.98-2.00
      ENERGY STAR cold climateYes
      Heating output as it gets colder97% kept at 5°F

      Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with D5FSHAH33XAK at the standard test temperatures, in BTU/h:

      Certified matchups25 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.
      D5FSHAH33XAK ARCOAIRE · cold climate19.612.010.535,000215324128
      D5FSHAH33XAK COMFORTMAKER · cold climate19.612.010.535,000215324201
      D5FSHAH33XAK DAY & NIGHT · cold climate19.612.010.535,000215324274
      D5FSHAH33XAK HEIL · cold climate19.612.010.535,000215324347
      D5FSHAH33XAK KEEPRITE · cold climate19.612.010.535,000215324420
      D5FSHAH33XAK KENMORE · cold climate19.612.010.535,000215324493
      D5FSHAH33XAK MIDEA · cold climate19.612.010.535,000215324566
      D5FSHAH33XAK TEMPSTAR · cold climate19.612.010.535,000215324639
      D5FSHAH33XAK SMART COMFORT · cold climate19.612.010.535,000215324712
      D5FSHAH33XAK AIRQUEST · cold climate19.612.010.535,000215324785
      D5FSHAH33XAK LPS Legacy · cold climate19.612.010.535,000215324858
      D5FSHAH33XAK Viessmann · cold climate19.612.010.535,000217178806
      D5FSAAH36XBK · cold climate16.711.710.034,000215318962
      D5FSAAH36XBK · cold climate16.711.710.034,000215319158
      D5FSAAH36XBK · cold climate16.711.710.034,000215319074
      D5FSAAH36XBK · cold climate16.711.710.034,000215318906
      D5FSAAH36XBK · cold climate16.711.710.034,000215318990
      D5FSAAH36XBK · cold climate16.711.710.034,000215318934
      D5FSAAH36XBK · cold climate16.711.710.034,000215319046
      D5FSAAH36XBK · cold climate16.711.710.034,000215319102
      D5FSAAH36XBK · cold climate16.711.710.034,000215319130
      D5FSAAH36XBK · cold climate16.711.710.034,000215319214
      D5FSAAH36XBK · cold climate16.711.710.034,000215319018
      D5FSAAH36XBK · cold climate16.711.710.034,000215319186
      D5FSAAH36XBK · cold climate16.711.710.034,000217178757
      Yearly running cost in 10 large cities$791-$2,107

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

      Questions5
      What is the SEER2 rating of the Arcoaire D5CSHAH33AAK?
      The Arcoaire D5CSHAH33AAK is rated at up to 19.6 SEER2 and 12.0 EER2 for cooling and up to 10.5 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 25 certified matchups SEER2 ranges from 16.7-19.6.
      Is the Arcoaire D5CSHAH33AAK good for cold climates?
      Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 35,000 BTU/h at 5°F with a COP of 2.00, so it is still 2.0 times as efficient as electric resistance heat at that temperature.
      How much does the Arcoaire D5CSHAH33AAK cost to run per year?
      At its rated efficiency it costs about $791-$2,107 a year in electricity in large U.S. cities, depending on climate and local rates - for example $974 in Phoenix and $1,760 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 Arcoaire D5CSHAH33AAK?
      ENERGY STAR lists 25 certified combinations for this outdoor unit. The highest-rated ones use ARCOAIRE D5FSHAH33XAK, COMFORTMAKER D5FSHAH33XAK, DAY & NIGHT D5FSHAH33XAK.
      What refrigerant does the Arcoaire D5CSHAH33AAK 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 $966/yrYou save $768/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 Arcoaire D5CSHAH33AAK
      3. What it replaces
      4. Price replace the example with your quote
      Heat pump, per year
      $966
      Current system, per year
      $1,734
      You save per year
      $768
      Payback
      16.3 years
      Net after 10 years
      -$4,817

      Cooling $593Heating $373Electricity used: 6,037 kWhSaved vs. a minimum-efficiency heat pump: $369

      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 September 22, 2026. How we use the data.