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      36,000 BTU mini-split heat pump · J-7

      Fujitsu AOUK036MSAN7

      Average cooling and heating efficiency for a 36,000 BTU mini-split heat pump, and certified for cold climates.

      Ranks #33 of 205 36,000 BTU mini-splits for cooling efficiency, and costs about $981 a year to run in a mixed climate like Atlanta.

      SEER2
      23.1 Cooling efficiency over a season
      Average · beats 66%
      HSPF2
      10.3 Heating efficiency over a season
      Average · beats 55%
      EER2
      15.4 Cooling efficiency on a 95°F day
      Excellent · beats 93%
      Heat at 5°F
      40,500 BTU/h96% of its 47°F output
      Very good · beats 88%

      A good fit if…

      • Your winters get properly cold - it is ENERGY STAR cold-climate certified, with 40,500 BTU/h at 5°F.
      • You want steady temperatures and quiet running - the compressor varies its speed.

      Think twice if…

      • Nothing stands out - its ratings have no weak spot for its class.

      Calculate my running cost

      Details

      Specifications36,000 BTU, R-32
      General
      BrandFujitsu
      Outdoor unit modelAOUK036MSAN7
      SeriesJ-7
      TypeMini-split heat pump
      Nominal size36,000 BTU
      CompressorVariable-speed units run longer at low powerContinuously variable
      RefrigerantR-32
      Connected (smart) capableNo
      On the market sinceJune 12, 2026
      Last certifiedMay 29, 2026
      Cooling
      SEER2Seasonal efficiency, higher is better23.1 (range 23.1)
      EER2Efficiency at 95°F outdoors15.4
      Cooling capacity36,000 BTU/h
      Heating
      HSPF2Seasonal efficiency, higher is better10.3
      Capacity at 47°F42,000 BTU/h
      Capacity at 17°F24,800 BTU/h
      Capacity at 5°F40,500 BTU/h
      COP at 5°F2.0 = twice as efficient as a space heater2.32
      ENERGY STAR cold climateYes
      Heating output as it gets colder96% kept at 5°F

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

      Certified matchups1 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.
      - FUJITSU · cold climate23.115.410.340,500218467766
      Yearly running cost in 10 large cities$740-$2,457

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

      Questions4
      What is the SEER2 rating of the Fujitsu AOUK036MSAN7?
      The Fujitsu AOUK036MSAN7 is rated at up to 23.1 SEER2 and 15.4 EER2 for cooling and up to 10.3 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with.
      Is the Fujitsu AOUK036MSAN7 good for cold climates?
      Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 40,500 BTU/h at 5°F with a COP of 2.32, so it is still 2.3 times as efficient as electric resistance heat at that temperature.
      How much does the Fujitsu AOUK036MSAN7 cost to run per year?
      At its rated efficiency it costs about $740-$2,457 a year in electricity in large U.S. cities, depending on climate and local rates - for example $978 in Phoenix and $2,104 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.
      What refrigerant does the Fujitsu AOUK036MSAN7 use?
      It uses 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 $1,005/yrYou save $949/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 Fujitsu AOUK036MSAN7
      3. What it replaces
      4. Price replace the example with your quote
      Heat pump, per year
      $1,005
      Current system, per year
      $1,954
      You save per year
      $949
      Payback
      14.2 years
      Net after 10 years
      -$4,008

      Cooling $549Heating $457Electricity used: 6,283 kWhSaved vs. a minimum-efficiency heat pump: $508

      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 36,000 BTU models

      See all 205 36,000 BTU mini-splits, ranked

      Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of May 29, 2026. How we use the data.