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      2.5-ton central heat pump · Breeze

      Friedrich WFPU18Z363C

      Average cooling efficiency and very good heating efficiency for a 2.5-ton central heat pump, and certified for cold climates.

      Ranks #44 of 199 2.5 ton central heat pumps for cooling efficiency, and costs about $799 a year to run in a mixed climate like Atlanta.

      SEER2
      18.0 Cooling efficiency over a season
      Average · beats 66%
      HSPF2
      9.5 Heating efficiency over a season
      Very good · beats 70%
      EER2
      10.1 Cooling efficiency on a 95°F day
      Below average · beats 14%
      Heat at 5°F
      26,000 BTU/h76% of its 47°F output
      Average · beats 52%

      A good fit if…

      • Your winters get properly cold - it is ENERGY STAR cold-climate certified, with 26,000 BTU/h at 5°F.
      • It will heat most of the year - its HSPF2 beats 70% 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

      Specifications2.5 ton, R-410A
      General
      BrandFriedrich
      Outdoor unit modelWFPU18Z363C
      SeriesBreeze
      TypeCentral heat pump
      Nominal size2.5 ton
      CompressorVariable-speed units run longer at low powerContinuously variable
      RefrigerantR-410A
      Connected (smart) capableNo
      On the market sinceMay 29, 2024
      Last certifiedFebruary 17, 2025
      Cooling
      SEER2Seasonal efficiency, higher is better18.0 (range 17.0-18.0)
      EER2Efficiency at 95°F outdoors10.1
      Cooling capacity28,200-34,000 BTU/h
      Heating
      HSPF2Seasonal efficiency, higher is better8.5-9.5
      Capacity at 47°F28,200-34,000 BTU/h
      Capacity at 17°F18,700-24,000 BTU/h
      Capacity at 5°F23,200-26,000 BTU/h
      COP at 5°F2.0 = twice as efficient as a space heater2.05-2.07
      ENERGY STAR cold climateYes
      Heating output as it gets colder76% kept at 5°F

      Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with WFH36Z193C at the standard test temperatures, in BTU/h:

      Certified matchups4 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.
      WFH36Z193C · cold climate18.010.19.526,000213795617
      FRH2TZ3617STANN · cold climate17.010.18.523,200214779539
      RH2TZ3617STANN · cold climate17.010.18.523,200214779541
      DRAH2TA3617STANN · cold climate17.010.18.523,200216014863
      Yearly running cost in 10 large cities$735-$1,893

      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 WFPU18Z363C?
      The Friedrich WFPU18Z363C is rated at up to 18.0 SEER2 and 10.1 EER2 for cooling and up to 9.5 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 4 certified matchups SEER2 ranges from 17.0-18.0.
      Is the Friedrich WFPU18Z363C good for cold climates?
      Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 26,000 BTU/h at 5°F with a COP of 2.07, so it is still 2.1 times as efficient as electric resistance heat at that temperature.
      How much does the Friedrich WFPU18Z363C cost to run per year?
      At its rated efficiency it costs about $735-$1,893 a year in electricity in large U.S. cities, depending on climate and local rates - for example $896 in Phoenix and $1,574 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 WFPU18Z363C?
      ENERGY STAR lists 4 certified combinations for this outdoor unit. The highest-rated ones use WFH36Z193C, FRH2TZ3617STANN, RH2TZ3617STANN.
      What refrigerant does the Friedrich WFPU18Z363C 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 $884/yrYou save $570/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 WFPU18Z363C
      3. What it replaces
      4. Price replace the example with your quote
      Heat pump, per year
      $884
      Current system, per year
      $1,454
      You save per year
      $570
      Payback
      18.4 years
      Net after 10 years
      -$4,799

      Cooling $551Heating $332Electricity used: 5,525 kWhSaved vs. a minimum-efficiency heat pump: $231

      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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      Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of February 17, 2025. How we use the data.