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      2-ton central heat pump · 15 SEER2 HP

      WeatherMaker PH5SAN524**AB

      Average cooling efficiency and below average heating efficiency for a 2-ton central heat pump, but not rated for cold climates.

      Ranks #263 of 331 2 ton central heat pumps for cooling efficiency, and costs about $723 a year to run in a mixed climate like Atlanta.

      SEER2
      16.5 Cooling efficiency over a season
      Average · beats 40%
      HSPF2
      8.5 Heating efficiency over a season
      Below average · beats 38%
      EER2
      13.0 Cooling efficiency on a 95°F day
      Very good · beats 89%
      Heat at 5°F
      11,900 BTU/h49% of its 47°F output
      Very good · beats 83%

      A good fit if…

      • You want a choice of indoor units - 116 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.
      • Comfort and noise matter - a single-stage compressor runs only full-on or off.

      Calculate my running cost

      Details

      Specifications2 ton, R-454B
      General
      BrandWeatherMaker
      Outdoor unit modelPH5SAN524**AB
      Series15 SEER2 HP
      TypeCentral heat pump
      Nominal size2 ton
      CompressorVariable-speed units run longer at low powerSingle stage
      RefrigerantR-454B
      Connected (smart) capableNo
      On the market sinceJanuary 1, 2024
      Last certifiedSeptember 22, 2026
      Cooling
      SEER2Seasonal efficiency, higher is better16.5 (range 15.2-16.5)
      EER2Efficiency at 95°F outdoors11.7-13.0
      Cooling capacity22,200-24,400 BTU/h
      Heating
      HSPF2Seasonal efficiency, higher is better7.8-8.5
      Capacity at 47°F21,600-24,000 BTU/h
      Capacity at 17°F14,200-15,200 BTU/h
      Capacity at 5°F10,800-11,900 BTU/h
      COP at 5°F2.0 = twice as efficient as a space heater1.98-2.26
      ENERGY STAR cold climateNo
      Heating output as it gets colder49% kept at 5°F

      Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with FMA5X30**AL at the standard test temperatures, in BTU/h:

      Certified matchups116 indoor units

      The same outdoor unit scores differently with each indoor unit and furnace. The 60 highest-rated of 116 are shown. Ask your installer for the AHRI reference number of the exact system you are quoted.

      Indoor unitFurnaceSEER2EER2HSPF2Heat @5°FAHRI ref.
      FMA5X30**AL-16.513.08.511,600218754045
      CAA**3721AMPG97VTAA60100C**16.012.58.011,500218754050
      FM(C,U)5Z36**AL-16.012.57.811,100218754056
      FM(C,U)5Z30**AL-16.012.57.811,100218754055
      CVAVA3817XMAPG92MSAA42060B**16.012.07.811,400218754035
      CVAVA3817XMAPG80VTLB48090B**16.012.57.811,400218754034
      CVAVA3817XMAPG80VTLB48070B**16.012.07.811,400218754033
      CVAVA3817XMAPG80MSUA48060B**16.012.57.811,200218754032
      CVAVA3817XMAPG80MS(A,L)A42090B**16.012.57.811,200218754031
      CVAVA3817XMAPG80MS(A,L)A48070B**16.012.07.811,400218754030
      CVAVA3817XMAPG80MS(A,L)A36070B**16.012.57.811,400218754029
      CVAVA3721XMAPG80MS(A,L)A48090C**16.012.07.811,200218754028
      CVAVA3117XMAPG80MSUA48060B**16.012.57.811,200218754027
      CVAMA3217XMAPG92MSAA48080B**16.012.07.811,200218754024
      CVAMA3217XMAPG80VTLB48090B**16.012.07.811,400218754023
      CVAMA3217XMAPG80MSUA48060B**16.012.57.811,300218754021
      CVAMA3217XMAPG80MS(A,L)A42090B**16.012.07.811,200218754020
      CVAMA3117XMAPG80MSUA48060B**16.012.07.811,200218754017
      CAA**3721AMPG95MSUA60100C**16.012.07.811,500218754016
      CAA**3721AMPG80VTLB66110C**16.012.07.811,500218754011
      CAA**2517AMPG80MSUA48060B**16.012.07.811,200218754001
      CAA**2517AMPG80MSUA36040B**16.012.57.811,300218754000
      CVAVA3117XMAPG80VTLB48090B**16.012.07.811,300218753992
      FM(C,U)5S36**AL-15.512.58.011,200218754755
      FM(C,U)5S30**AL-15.512.58.011,200218754754
      FM(C,U)5Z24**AL-15.512.08.011,300218754054
      FJ5AN*B36L-15.512.07.811,400218754743
      FMA5X24**AL-15.512.07.810,800218754044
      FEVB0036**+NAVA53601CK-15.512.07.811,400218754039
      CVAVA3817XMAPG95MSUA48060B**15.512.07.811,400218754036
      CVAVA3117XMAPG80MS(A,L)A36070B**15.512.07.811,300218754026
      CVAMA3217XMAPG95MSUA48060B**15.512.07.811,400218754025
      CVAMA3217XMAPG80VTLB48070B**15.512.07.811,400218754022
      CVAMA3217XMAPG80MS(A,L)A48070B**15.512.07.811,400218754019
      CVAMA3217XMAPG80MS(A,L)A36070B**15.512.07.811,400218754018
      CAA**3721AMPG96MSAA60100C**15.512.07.811,600218754015
      CAA**3721AMPG92MSAA60100C**15.512.07.811,500218754014
      CAA**3721AMPG92MSAA60080C**15.512.07.811,500218754013
      CAA**3721AMPG92MSAA48080B**15.512.07.811,400218754012
      CAA**3721AMPG80MSUA60080C**15.512.07.811,400218754010
      CAA**3721AMPG80MSUA36040B**15.512.07.811,500218754009
      CAA**3721AMPG80MS(A,L)A60110C**15.512.07.811,400218754008
      CAA**3721AMPG80MS(A,L)A60090C**15.512.07.811,600218754007
      CAA**3721AMPG80MS(A,L)A42090B**15.512.07.811,400218754006
      CAA**3717AMPG80MSUA48060B**15.512.07.811,200218754005
      CAA**2517AMPG80MS(A,L)A42090B**15.512.07.811,400218753999
      CAA**2517AMPG80MS(A,L)A36070B**15.512.07.811,200218753998
      CVAVA3817XMAPG96VTAB48080B**15.512.07.811,300218753996
      CVAVA3817XMAPG96VTAB48060B**15.512.07.811,400218753995
      CVAVA3817XMAPG80MS(A,L)A42045B**15.512.07.811,500218753994
      CVAVA3117XMAPG95MSUA48060B**15.512.07.811,300218753993
      CVAVA3117XMAPG80VTLB48070B**15.512.07.811,300218753991
      CVAVA3117XMAPG80MS(A,L)A48070B**15.512.07.811,300218753990
      CVAMA3217XMAPG96VTAB48080B**15.512.07.811,300218753989
      CVAMA3217XMAPG96VTAB48060B**15.512.07.811,400218753988
      CVAMA3117XMAPG95MSUA48060B**15.512.07.811,300218753987
      CVAMA3117XMAPG80MS(A,L)A48070B**15.512.07.811,300218753986
      CAA**3721AMPG95MSUA60080C**15.512.57.811,600218753983
      CAA**3721AMPG92MSAA42060B**15.512.07.811,600218753980
      CAA**3721AMPG80VTLB60090C**15.512.07.811,600218753979
      Yearly running cost in 10 large cities$676-$1,705

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

      Questions5
      What is the SEER2 rating of the WeatherMaker PH5SAN524**AB?
      The WeatherMaker PH5SAN524**AB is rated at up to 16.5 SEER2 and 13.0 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 116 certified matchups SEER2 ranges from 15.2-16.5.
      Is the WeatherMaker PH5SAN524**AB 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-ton model.
      How much does the WeatherMaker PH5SAN524**AB cost to run per year?
      At its rated efficiency it costs about $676-$1,705 a year in electricity in large U.S. cities, depending on climate and local rates - for example $819 in Phoenix and $1,413 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 WeatherMaker PH5SAN524**AB?
      ENERGY STAR lists 116 certified combinations for this outdoor unit. The highest-rated ones use FMA5X30**AL, CAA**3721AM, FM(C,U)5Z36**AL.
      What refrigerant does the WeatherMaker PH5SAN524**AB 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 $806/yrYou save $402/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 WeatherMaker PH5SAN524**AB
      3. What it replaces
      4. Price replace the example with your quote
      Heat pump, per year
      $806
      Current system, per year
      $1,208
      You save per year
      $402
      Payback
      22.4 years
      Net after 10 years
      -$4,980

      Cooling $508Heating $298Electricity used: 5,035 kWhSaved vs. a minimum-efficiency heat pump: $118

      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 September 22, 2026. How we use the data.