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      48,000 BTU mini-split heat pump · AIRSTAGE H-series

      Fujitsu AOUH48KUAH1

      Below average cooling efficiency and average heating efficiency for a 48,000 BTU mini-split heat pump, and certified for cold climates.

      Ranks #58 of 146 48,000 BTU mini-splits for cooling efficiency, and costs about $1,224 a year to run in a mixed climate like Atlanta.

      SEER2
      21.5 Cooling efficiency over a season
      Below average · beats 39%
      HSPF2
      10.5 Heating efficiency over a season
      Average · beats 61%
      EER2
      12.5 Cooling efficiency on a 95°F day
      Average · beats 44%
      Heat at 5°F
      51,000 BTU/h100% of its 47°F output
      Below average · beats 36%

      A good fit if…

      • Your winters get properly cold - it is ENERGY STAR cold-climate certified, with 51,000 BTU/h at 5°F.
      • You want steady temperatures and quiet running - the compressor varies its speed.

      Think twice if…

      • Cooling cost matters most - its SEER2 is below average for mini-splits.

      Calculate my running cost

      Details

      Specifications48,000 BTU, R-32
      General
      BrandFujitsu
      Outdoor unit modelAOUH48KUAH1
      SeriesAIRSTAGE H-series
      TypeMini-split heat pump
      Nominal size48,000 BTU
      CompressorVariable-speed units run longer at low powerContinuously variable
      RefrigerantR-32
      Connected (smart) capableNo
      On the market sinceOctober 20, 2025
      Last certifiedApril 27, 2026
      Cooling
      SEER2Seasonal efficiency, higher is better21.5 (range 19.0-21.5)
      EER2Efficiency at 95°F outdoors11.2-12.5
      Cooling capacity45,500-46,000 BTU/h
      Heating
      HSPF2Seasonal efficiency, higher is better10.0-10.5
      Capacity at 47°F51,000 BTU/h
      Capacity at 17°F34,000 BTU/h
      Capacity at 5°F51,000 BTU/h
      COP at 5°F2.0 = twice as efficient as a space heater1.92-1.96
      ENERGY STAR cold climateYes
      Heating output as it gets colder100% kept at 5°F

      Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with AUUH48KUAS at the standard test temperatures, in BTU/h:

      Certified matchups3 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.
      AUUH48KUAS FUJITSU · cold climate21.512.510.551,000217895711
      AMUH48KUAS FUJITSU · cold climate19.011.210.251,000217895718
      ARUH48KUAS FUJITSU · cold climate19.012.010.051,000217895715
      Yearly running cost in 10 large cities$1,010-$2,995

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

      Questions5
      What is the SEER2 rating of the Fujitsu AOUH48KUAH1?
      The Fujitsu AOUH48KUAH1 is rated at up to 21.5 SEER2 and 12.5 EER2 for cooling and up to 10.5 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 3 certified matchups SEER2 ranges from 19.0-21.5.
      Is the Fujitsu AOUH48KUAH1 good for cold climates?
      Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 51,000 BTU/h at 5°F with a COP of 1.96, so it is still 2.0 times as efficient as electric resistance heat at that temperature.
      How much does the Fujitsu AOUH48KUAH1 cost to run per year?
      At its rated efficiency it costs about $1,010-$2,995 a year in electricity in large U.S. cities, depending on climate and local rates - for example $1,286 in Phoenix and $2,534 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 Fujitsu AOUH48KUAH1?
      ENERGY STAR lists 3 certified combinations for this outdoor unit. The highest-rated ones use FUJITSU AUUH48KUAS, FUJITSU AMUH48KUAS, FUJITSU ARUH48KUAS.
      What refrigerant does the Fujitsu AOUH48KUAH1 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 $1,297/yrYou save $1,157/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 AOUH48KUAH1
      3. What it replaces
      4. Price replace the example with your quote
      Heat pump, per year
      $1,297
      Current system, per year
      $2,454
      You save per year
      $1,157
      Payback
      15.1 years
      Net after 10 years
      -$5,934

      Cooling $753Heating $544Electricity used: 8,107 kWhSaved vs. a minimum-efficiency heat pump: $597

      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 146 48,000 BTU mini-splits, ranked

      Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of April 27, 2026. How we use the data.