HVAC Rated
    Menu

      3-ton central heat pump · F-SERIES PLUS

      Friedrich FWP15AZ36AJ2N

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

      Ranks #278 of 302 3 ton central heat pumps for cooling efficiency, and costs about $1,141 a year to run in a mixed climate like Atlanta.

      SEER2
      15.2 Cooling efficiency over a season
      Below average · beats 6%
      HSPF2
      8.1 Heating efficiency over a season
      Below average · beats 20%
      EER2
      11.7 Cooling efficiency on a 95°F day
      Average · beats 43%
      Heat at 5°F
      19,900 BTU/h56% of its 47°F output
      Very good · beats 88%

      A good fit if…

      • You want a choice of indoor units - 38 certified pairings.

      Think twice if…

      • You often see nights below 0°F - it is not cold-climate certified.
      • Cooling cost matters most - its SEER2 is below average for central heat pumps.
      • You mainly need heat - its HSPF2 is below average for central heat pumps.
      • You want the newest refrigerant - it uses R-410A, which is being phased down.

      Calculate my running cost

      Details

      Specifications3 ton, R-410A
      General
      BrandFriedrich
      Outdoor unit modelFWP15AZ36AJ2N
      SeriesF-SERIES PLUS
      TypeCentral heat pump
      Nominal size3 ton
      CompressorVariable-speed units run longer at low powerTwo-stage
      RefrigerantR-410A
      Connected (smart) capableNo
      On the market sinceFebruary 24, 2023
      Last certifiedJune 3, 2026
      Cooling
      SEER2Seasonal efficiency, higher is better15.2 (range 15.2)
      EER2Efficiency at 95°F outdoors11.7
      Cooling capacity34,000-34,200 BTU/h
      Heating
      HSPF2Seasonal efficiency, higher is better7.8-8.1
      Capacity at 47°F34,000-34,200 BTU/h
      Capacity at 17°F22,400-24,800 BTU/h
      Capacity at 5°F17,500-19,900 BTU/h
      COP at 5°F2.0 = twice as efficient as a space heater2.00-2.30
      ENERGY STAR cold climateNo
      Heating output as it gets colder56% kept at 5°F

      Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with FRH2VZ3621STANN at the standard test temperatures, in BTU/h:

      Certified matchups38 indoor units

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

      Indoor unitFurnaceSEER2EER2HSPF2Heat @5°FAHRI ref.
      FRH2VZ3621STANN-15.211.78.119,300213382071
      FRH2VZ3617STANN-15.211.78.119,400213382072
      TCFZ3621STANMFR802V1004A17UH15.211.78.119,800213841480
      TCFZ3621STANMFR802V1005A21UH15.211.78.119,800213841518
      TCFZ3621STANMFR801V0755A21UH15.211.78.119,700213841490
      TCFZ3621STANMFR802V0755A21UH15.211.78.119,700213841499
      TCFZ3621STANMFR801V0754A17UH15.211.78.119,700213841493
      TCFZ3621STANMFR802V1005A21UHN15.211.78.119,800213841501
      TCFZ3621STANMFR802V0754A17UH15.211.78.119,700213841457
      TCFZ3621STANMFR801V1005A21UHU15.211.78.119,800213841503
      TCFZ3617STANMFR801V1004A17UH15.211.78.119,900213841508
      TCFZ3621STANMFR802V0755A21DZ15.211.78.119,700213841513
      TCFZ3621STANMFR801V1005A21UHS15.211.78.119,700213841512
      TCFZ3621STANMFR801V0755A21DZ15.211.78.119,700213841516
      TCFZ3617STANMFR802V0754A17UH15.211.78.119,700213841451
      TCFZ3617STANMFR801V0754A17UH15.211.78.119,700213841458
      TCFZ3621STANMFR801V1005A21DZ15.211.78.119,700213841460
      TCFZ3621STANMFR801V1005A21UHN15.211.78.119,700213841452
      TCFZ3617STANMFR802V1004A17UH15.211.78.119,800213841468
      RCFZ3621STANMFR802V1005A21UH15.211.78.119,800214328095
      RCFZ3621STANMFR802V0755A21UH15.211.78.119,700214328082
      RCFZ3617STANMFR802V0754A17UH15.211.78.119,700214328062
      RCFZ3621STANMFR802V1004A17UH15.211.78.119,800214328074
      RCFZ3621STANMFR801V1005A21UHN15.211.78.119,700214328063
      RCFZ3621STANMFR801V0755A21DZ15.211.78.119,700214328093
      RCFZ3621STANMFR802V1005A21UHN15.211.78.119,800214328084
      RCFZ3621STANMFR801V1005A21UHS15.211.78.119,700214328091
      RCFZ3621STANMFR801V1005A21DZ15.211.78.119,700214328067
      RCFZ3617STANMFR801V1004A17UH15.211.78.119,900214328087
      RCFZ3621STANMFR802V0755A21DZ15.211.78.119,700214328092
      RCFZ3617STANMFR801V0754A17UH15.211.78.119,700214328066
      RCFZ3621STANMFR801V0754A17UH15.211.78.119,700214328079
      RCFZ3621STANMFR801V0755A21UH15.211.78.119,700214328077
      RCFZ3617STANMFR802V1004A17UH15.211.78.119,800214328069
      RCFZ3621STANMFR801V1005A21UHU15.211.78.119,800214328086
      RCFZ3621STANMFR802V0754A17UH15.211.78.119,700214328065
      FRH2TZ3617STANN-15.211.77.819,400213087951
      FRH3VZ3617STACN-15.211.77.817,500214664605
      Yearly running cost in 10 large cities$1,055-$2,698

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

      Questions5
      What is the SEER2 rating of the Friedrich FWP15AZ36AJ2N?
      The Friedrich FWP15AZ36AJ2N is rated at up to 15.2 SEER2 and 11.7 EER2 for cooling and up to 8.1 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with.
      Is the Friedrich FWP15AZ36AJ2N 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 Friedrich FWP15AZ36AJ2N cost to run per year?
      At its rated efficiency it costs about $1,055-$2,698 a year in electricity in large U.S. cities, depending on climate and local rates - for example $1,284 in Phoenix and $2,241 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 Friedrich FWP15AZ36AJ2N?
      ENERGY STAR lists 38 certified combinations for this outdoor unit. The highest-rated ones use FRH2VZ3621STANN, FRH2VZ3617STANN, TCFZ3621STANM.
      What refrigerant does the Friedrich FWP15AZ36AJ2N 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 $1,265/yrYou save $499/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 Friedrich FWP15AZ36AJ2N
      3. What it replaces
      4. Price replace the example with your quote
      Heat pump, per year
      $1,265
      Current system, per year
      $1,763
      You save per year
      $499
      Payback
      26.1 years
      Net after 10 years
      -$8,015

      Cooling $792Heating $473Electricity used: 7,906 kWhSaved vs. a minimum-efficiency heat pump: $88

      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 3 ton models

      See all 302 3 ton central heat pumps, ranked

      Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of June 3, 2026. How we use the data.