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

      WeatherMaker PH8TAN536**AB

      Average cooling efficiency and below average heating efficiency for a 3-ton central heat pump, but not rated for cold climates.

      Ranks #168 of 302 3 ton central heat pumps for cooling efficiency, and costs about $1,163 a year to run in a mixed climate like Atlanta.

      SEER2
      17.0 Cooling efficiency over a season
      Average · beats 49%
      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
      19,600 BTU/h49% of its 47°F output
      Excellent · beats 98%

      A good fit if…

      • You want a choice of indoor units - 104 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

      Specifications3 ton, R-454B
      General
      BrandWeatherMaker
      Outdoor unit modelPH8TAN536**AB
      Series2-STAGE 18 SEER HP
      TypeCentral heat pump
      Nominal size3 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 better17.0 (range 15.2-17.0)
      EER2Efficiency at 95°F outdoors11.7-13.0
      Cooling capacity33,800-38,000 BTU/h
      Heating
      HSPF2Seasonal efficiency, higher is better7.8-8.5
      Capacity at 47°F37,200-39,000 BTU/h
      Capacity at 17°F23,000-24,200 BTU/h
      Capacity at 5°F17,500-19,600 BTU/h
      COP at 5°F2.0 = twice as efficient as a space heater1.78-2.48
      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 PF5TNBD60L at the standard test temperatures, in BTU/h:

      Certified matchups104 indoor units

      The same outdoor unit scores differently with each indoor unit and furnace. The 60 highest-rated of 104 are shown. Ask your installer for the AHRI reference number of the exact system you are quoted.

      Indoor unitFurnaceSEER2EER2HSPF2Heat @5°FAHRI ref.
      PF5TNBD60L-17.013.08.518,600218755135
      PF5TNXC48L-16.512.58.118,700218755133
      QFVA5D4821X-16.513.08.118,400218755722
      CAA**4321AMPG80MSUA60080C**16.012.08.519,100218755306
      QFVA5D3617X-16.012.58.118,300218755721
      CAA**4821AMPG80MSUA60080C**16.012.08.119,000218755321
      CAA**4321AMPG80MSUA48060B**16.012.08.119,300218755305
      CAA**3721AMPG80MSUA48060B**16.012.08.119,300218755275
      CVAVA3817XMAPG80VTLB48090B**16.012.58.017,600218754974
      CVAVA3817XMAPG80MSUA48060B**16.012.58.017,600218754971
      CVAVA3817XMAPG80MSUA36040B**16.012.58.017,600218754970
      CVAMA4921XMAPG96VTAB60100C**16.012.58.017,900218754940
      CVAMA4921XMAPG80VTLB60090C**16.012.58.017,900218754938
      CVAMA4921XMAPG80MSUA60080C**16.012.58.017,700218754935
      CVAMA4821XMAPG80MSUA60080C**16.012.58.017,500218754925
      CVAMA4921XMAPG97VTAA60100C**16.012.58.017,900218755610
      CAA**3717AMPG80MSUA48060B**15.512.08.118,800218755264
      CAA**3717AMPG80MSUA36040B**15.512.08.118,800218755263
      CSAH*4212AMPG80MSUA60080C**15.512.08.119,000218755352
      CAA**4821AMPG96VTAB60100C**15.511.78.119,100218755334
      CAA**4821AMPG95MSUA60100C**15.511.78.119,100218755330
      CAA**4821AMPG80VTLB66110C**15.512.08.119,100218755326
      CAA**4821AMPG80VTLB60090C**15.511.78.119,200218755325
      CAA**4821AMPG80MSUA60100C**15.511.78.119,300218755322
      CAA**4821AMPG80MSUA48060B**15.512.08.119,000218755320
      CAA**4821AMPG80MSUA36040B**15.511.78.119,200218755319
      CAA**4321AMPG96VTAB60100C**15.512.08.119,200218755318
      CAA**4321AMPG96VTAB60080C**15.511.78.119,300218755317
      CAA**4321AMPG95MSUA60100C**15.511.78.119,400218755314
      CAA**4321AMPG95MSUA60080C**15.512.08.119,300218755313
      CAA**4321AMPG80VTLB66110C**15.512.08.119,200218755311
      CAA**4321AMPG80VTLB60090C**15.512.08.119,300218755310
      CAA**4321AMPG80VTLB48090B**15.512.08.119,300218755309
      CAA**4321AMPG80VTLB48070B**15.511.78.119,400218755308
      CAA**4321AMPG80MSUA60100C**15.512.08.119,400218755307
      CAA**4321AMPG80MSUA36040B**15.512.08.119,300218755304
      CAA**4221AMPG80VTLB60090C**15.511.78.118,900218755295
      CAA**4221AMPG80MSUA60080C**15.512.08.118,800218755291
      CAA**3721AMPG96VTAB60100C**15.512.08.119,300218755288
      CAA**3721AMPG96VTAB60080C**15.511.78.119,300218755287
      CAA**3721AMPG95MSUA60100C**15.511.78.119,400218755284
      CAA**3721AMPG95MSUA60080C**15.512.08.119,300218755283
      CAA**3721AMPG80VTLB66110C**15.511.78.119,500218755281
      CAA**3721AMPG80VTLB60090C**15.512.08.119,300218755280
      CAA**3721AMPG80VTLB48090B**15.511.78.119,300218755279
      CAA**3721AMPG80MSUA60100C**15.512.08.119,400218755277
      CAA**3721AMPG80MSUA60080C**15.512.08.119,100218755276
      CAA**3721AMPG80MSUA36040B**15.512.08.119,300218755274
      CAA**4321AMPG97VTAA60100C**15.512.08.019,200218755704
      CAA**3721AMPG97VTAA60100C**15.512.08.019,300218755701
      CVAVA4821XMAPG80VTLB60090C**15.512.07.817,700218755002
      CVAVA4821XMAPG80MSUA60080C**15.512.57.817,500218754998
      CVAVA4821XMAPG80MSUA48060B**15.512.07.817,700218754997
      CVAVA3817XMAPG96VTAB48080B**15.512.07.817,900218754977
      CVAVA3817XMAPG95MSUA48060B**15.512.07.817,800218754975
      CVAVA3817XMAPG80VTLB48070B**15.512.07.817,700218754973
      CVAVA3721XMAPG80VTLB60090C**15.512.07.817,700218754964
      CVAVA3721XMAPG80MSUA48060B**15.512.07.817,700218754961
      CVAMA4921XMAPG80VTLB48090B**15.512.07.818,000218754937
      CVAMA4821XMAPG96VTAB60100C**15.512.07.817,800218754934
      Yearly running cost in 10 large cities$992-$2,820

      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 PH8TAN536**AB?
      The WeatherMaker PH8TAN536**AB is rated at up to 17.0 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 104 certified matchups SEER2 ranges from 15.2-17.0.
      Is the WeatherMaker PH8TAN536**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 3-ton model.
      How much does the WeatherMaker PH8TAN536**AB cost to run per year?
      At its rated efficiency it costs about $992-$2,820 a year in electricity in large U.S. cities, depending on climate and local rates - for example $1,246 in Phoenix and $2,374 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 PH8TAN536**AB?
      ENERGY STAR lists 104 certified combinations for this outdoor unit. The highest-rated ones use PF5TNBD60L, PF5TNXC48L, QFVA5D4821X.
      What refrigerant does the WeatherMaker PH8TAN536**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 $1,249/yrYou save $642/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 PH8TAN536**AB
      3. What it replaces
      4. Price replace the example with your quote
      Heat pump, per year
      $1,249
      Current system, per year
      $1,890
      You save per year
      $642
      Payback
      21.0 years
      Net after 10 years
      -$7,084

      Cooling $741Heating $507Electricity used: 7,804 kWhSaved vs. a minimum-efficiency heat pump: $208

      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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      See all 302 3 ton central heat pumps, ranked

      Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of September 22, 2026. How we use the data.