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      2-ton central heat pump · 2-STAGE 18 SEER HP

      WeatherMaker PH8TAN524**AB

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

      Ranks #106 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
      18.5 Cooling efficiency over a season
      Very good · beats 77%
      HSPF2
      8.5 Heating efficiency over a season
      Below average · beats 38%
      EER2
      14.0 Cooling efficiency on a 95°F day
      Excellent · beats 98%
      Heat at 5°F
      11,400 BTU/h45% of its 47°F output
      Very good · beats 81%

      A good fit if…

      • You want low cooling bills - its SEER2 beats 77% of central heat pumps.
      • You want a choice of indoor units - 187 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.

      Calculate my running cost

      Details

      Specifications2 ton, R-454B
      General
      BrandWeatherMaker
      Outdoor unit modelPH8TAN524**AB
      Series2-STAGE 18 SEER HP
      TypeCentral heat pump
      Nominal size2 ton
      CompressorVariable-speed units run longer at low powerTwo-stage
      RefrigerantR-454B
      Connected (smart) capableNo
      On the market sinceNovember 4, 2024
      Last certifiedSeptember 22, 2026
      Cooling
      SEER2Seasonal efficiency, higher is better18.5 (range 15.2-18.5)
      EER2Efficiency at 95°F outdoors11.7-14.0
      Cooling capacity22,200-25,000 BTU/h
      Heating
      HSPF2Seasonal efficiency, higher is better7.8-8.5
      Capacity at 47°F24,000-25,200 BTU/h
      Capacity at 17°F14,100-14,900 BTU/h
      Capacity at 5°F10,700-11,400 BTU/h
      COP at 5°F2.0 = twice as efficient as a space heater1.90-2.24
      ENERGY STAR cold climateNo
      Heating output as it gets colder45% kept at 5°F

      Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with CVAMA3217XMA at the standard test temperatures, in BTU/h:

      Certified matchups187 indoor units

      The same outdoor unit scores differently with each indoor unit and furnace. The 60 highest-rated of 187 are shown. Ask your installer for the AHRI reference number of the exact system you are quoted.

      Indoor unitFurnaceSEER2EER2HSPF2Heat @5°FAHRI ref.
      CVAMA3217XMAPG80VTLB36070A**18.514.07.810,900218754807
      CVAMA3217XMAPG80MSUA36040B**18.514.07.810,800218754804
      CAA**3721AMPG97VTAA60080C**18.013.08.511,200218755691
      CAA**3721AMPG96VTAB60080C**18.013.08.511,200218755473
      CAA**3721AMPG95MSUA60100C**18.013.08.511,200218755469
      CAA**3721AMPG80VTLB66110C**18.013.08.511,200218755465
      CAA**3721AMPG80MSUA60080C**18.013.58.511,100218755460
      CAA**3721AMPG80MSUA48060B**18.013.58.511,200218755459
      CAA**3721AMPG80MSUA36040B**18.013.08.511,100218755458
      PF5TNXC36L-18.013.08.110,700218755544
      CAA**3721AMPG96VTAB60100C**18.013.08.111,100218755474
      CAA**3721AMPG96VTAB48060B**18.013.08.111,200218755471
      CAA**3721AMPG80VTLB48090B**18.013.08.111,100218755463
      CAA**3721AMPG80VTLB48070B**18.013.08.111,100218755462
      CAA**2517AMPG80VTLB36070A**18.013.08.111,000218755405
      CAA**2517AMPG80MSUA36040B**18.013.08.111,100218755402
      CVAVA3817XMAPG80VTLB48090B**18.014.08.011,100218754908
      CVAVA3817XMAPG80VTLB48070B**18.013.58.011,100218754907
      CVAVA3817XMAPG96VTAB48060B**18.013.57.811,100218754913
      CVAVA3721XMAPG96VTAB60080C**18.013.57.810,900218754902
      CVAVA3721XMAPG80MSUA60100C**18.013.57.810,900218754890
      CVAVA3621XMAPG96VTAB60080C**18.013.57.810,800218754885
      CVAVA3621XMAPG80VTLB66110C**18.013.57.810,800218754878
      CVAVA3117XMAPG80VTLB36045A**18.013.57.811,000218754851
      CVAMA3117XMAPG96VTAB48060B**18.013.57.811,100218754802
      QFVA5D3617X-18.014.07.811,300218755720
      PF5TNXB24L-17.513.08.111,100218754765
      CAA**3721AMPG96VTAB48080B**17.513.08.111,200218755472
      CAA**3721AMPG95MSUA60080C**17.513.08.111,100218755468
      CAA**3721AMPG95MSUA48060B**17.513.08.111,100218755467
      CAA**3721AMPG95MSUA36040B**17.513.08.111,200218755466
      CAA**3721AMPG80VTLB60090C**17.513.08.111,100218755464
      CAA**3721AMPG80MSUA60100C**17.513.08.111,100218755461
      CAA**3717AMPG96VTAB48080B**17.513.08.111,100218755457
      CAA**3717AMPG80VTLB48090B**17.513.08.111,000218755450
      CAA**3717AMPG80VTLB48070B**17.513.08.111,000218755449
      CAA**3717AMPG80VTLB36070A**17.513.08.111,100218755448
      CAA**3717AMPG80VTLB36045A**17.513.08.111,100218755447
      CAA**3717AMPG80MSUA48060B**17.513.08.111,100218755446
      CAA**3717AMPG80MSUA36040B**17.513.08.111,000218755445
      CAA**3617AMPG80VTLB36070A**17.512.58.110,900218755435
      CAA**3617AMPG80VTLB36045A**17.512.58.110,900218755434
      CAA**2517AMPG96VTAB48080B**17.513.08.111,100218755414
      CAA**2517AMPG96VTAB48060B**17.513.08.111,200218755413
      CAA**2517AMPG95MSUA48060B**17.513.08.111,100218755409
      CAA**2517AMPG80VTLB48090B**17.513.08.111,100218755407
      CAA**2517AMPG80VTLB48070B**17.513.08.111,100218755406
      CAA**2517AMPG80VTLB36045A**17.513.08.111,000218755404
      CAA**2517AMPG80MSUA48060B**17.512.58.111,000218755403
      CAA**3721AMPG97VTAA60100C**17.513.08.011,100218755692
      CAA**3721AMPG97VTAA48080B**17.513.08.011,200218755690
      CAA**3721AMPG97VTAA48060B**17.513.08.011,200218755689
      CAA**2517AMPG97VTAA48080B**17.513.08.011,100218755682
      CAA**2517AMPG97VTAA48060B**17.513.08.011,200218755681
      QFVA5D2417X-17.513.57.811,200218755719
      CAA**3617AMPG80MSUA48060B**17.513.07.810,900218755433
      CAA**3617AMPG80MSUA36040B**17.513.07.810,900218755432
      CAA**3017AMPG80MSUA48060B**17.512.07.810,900218755420
      CAA**3721AMPG96VTAB36040B**17.012.58.111,400218755470
      CAA**3717AMPG96VTAB48060B**17.012.58.111,100218755456
      Yearly running cost in 10 large cities$587-$1,777

      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 PH8TAN524**AB?
      The WeatherMaker PH8TAN524**AB is rated at up to 18.5 SEER2 and 14.0 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 187 certified matchups SEER2 ranges from 15.2-18.5.
      Is the WeatherMaker PH8TAN524**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 PH8TAN524**AB cost to run per year?
      At its rated efficiency it costs about $587-$1,777 a year in electricity in large U.S. cities, depending on climate and local rates - for example $753 in Phoenix and $1,507 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 PH8TAN524**AB?
      ENERGY STAR lists 187 certified combinations for this outdoor unit. The highest-rated ones use CVAMA3217XMA, CAA**3721AM, PF5TNXC36L.
      What refrigerant does the WeatherMaker PH8TAN524**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 $762/yrYou save $450/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 PH8TAN524**AB
      3. What it replaces
      4. Price replace the example with your quote
      Heat pump, per year
      $762
      Current system, per year
      $1,212
      You save per year
      $450
      Payback
      18.9 years
      Net after 10 years
      -$3,996

      Cooling $438Heating $324Electricity used: 4,761 kWhSaved vs. a minimum-efficiency heat pump: $172

      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.