HVAC Rated
    Menu

      2-ton central heat pump · AZPN Series

      Kepler AZPN/24WD

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

      Ranks #202 of 331 2 ton central heat pumps for cooling efficiency, and costs about $677 a year to run in a mixed climate like Atlanta.

      SEER2
      17.4 Cooling efficiency over a season
      Average · beats 55%
      HSPF2
      10.2 Heating efficiency over a season
      Excellent · beats 91%
      EER2
      11.7 Cooling efficiency on a 95°F day
      Average · beats 43%
      Heat at 5°F
      22,600 BTU/h94% of its 47°F output
      Below average · beats 39%

      A good fit if…

      • Your winters get properly cold - it is ENERGY STAR cold-climate certified, with 22,600 BTU/h at 5°F.
      • It will heat most of the year - its HSPF2 beats 91% of central heat pumps.
      • 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

      Specifications2 ton, R-410A
      General
      BrandKepler
      Outdoor unit modelAZPN/24WD
      SeriesAZPN Series
      TypeCentral heat pump
      Nominal size2 ton
      CompressorVariable-speed units run longer at low powerContinuously variable
      RefrigerantR-410A
      Connected (smart) capableNo
      On the market sinceMay 20, 2024
      Last certifiedJune 9, 2026
      Cooling
      SEER2Seasonal efficiency, higher is better17.4 (range 16.1-17.4)
      EER2Efficiency at 95°F outdoors10.7-11.7
      Cooling capacity20,000-24,000 BTU/h
      Heating
      HSPF2Seasonal efficiency, higher is better9.5-10.2
      Capacity at 47°F24,000-25,000 BTU/h
      Capacity at 17°F19,200-22,400 BTU/h
      Capacity at 5°F20,000-22,600 BTU/h
      COP at 5°F2.0 = twice as efficient as a space heater1.91-2.00
      ENERGY STAR cold climateYes
      Heating output as it gets colder94% kept at 5°F

      Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with AZPN/24WAH at the standard test temperatures, in BTU/h:

      Certified matchups7 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.
      AZPN/24WAH · cold climate17.411.710.022,600213062288
      AZPN/B24WAC · cold climate16.510.79.520,000213062282
      AZPN/B24WAC-UC · cold climate16.510.79.520,000214610376
      AZPN/A24WACUID · cold climate16.311.710.220,000213433211
      AZPN/A18WAC · cold climate16.311.710.220,000214610374
      AZPN/A24WACUID · cold climate16.110.79.820,000213433212
      AZPN/A18WAC-UC · cold climate16.110.79.820,000214610375
      Yearly running cost in 10 large cities$646-$1,584

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

      Questions5
      What is the SEER2 rating of the Kepler AZPN/24WD?
      The Kepler AZPN/24WD is rated at up to 17.4 SEER2 and 11.7 EER2 for cooling and up to 10.2 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 7 certified matchups SEER2 ranges from 16.1-17.4.
      Is the Kepler AZPN/24WD good for cold climates?
      Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 22,600 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 Kepler AZPN/24WD cost to run per year?
      At its rated efficiency it costs about $646-$1,584 a year in electricity in large U.S. cities, depending on climate and local rates - for example $776 in Phoenix and $1,308 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 Kepler AZPN/24WD?
      ENERGY STAR lists 7 certified combinations for this outdoor unit. The highest-rated ones use AZPN/24WAH, AZPN/B24WAC, AZPN/B24WAC-UC.
      What refrigerant does the Kepler AZPN/24WD 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 $760/yrYou save $494/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 Kepler AZPN/24WD
      3. What it replaces
      4. Price replace the example with your quote
      Heat pump, per year
      $760
      Current system, per year
      $1,254
      You save per year
      $494
      Payback
      18.2 years
      Net after 10 years
      -$4,062

      Cooling $486Heating $275Electricity used: 4,750 kWhSaved vs. a minimum-efficiency heat pump: $204

      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 June 9, 2026. How we use the data.