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      12,000 BTU mini-split heat pump · AIRSTAGE H-series

      Fujitsu AOUH12KUAS1

      Very good cooling and heating efficiency for a 12,000 BTU mini-split heat pump, and certified for cold climates.

      Ranks #200 of 394 12,000 BTU mini-splits for cooling efficiency, and costs about $330 a year to run in a mixed climate like Atlanta.

      SEER2
      23.7 Cooling efficiency over a season
      Very good · beats 72%
      HSPF2
      11.5 Heating efficiency over a season
      Very good · beats 84%
      EER2
      14.1 Cooling efficiency on a 95°F day
      Very good · beats 85%
      Heat at 5°F
      16,100 BTU/h97% of its 47°F output
      Average · beats 61%

      A good fit if…

      • You want low cooling bills - its SEER2 beats 72% of mini-splits.
      • Your winters get properly cold - it is ENERGY STAR cold-climate certified, with 16,100 BTU/h at 5°F.
      • It will heat most of the year - its HSPF2 beats 84% of mini-splits.
      • 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

      Specifications12,000 BTU, R-32
      General
      BrandFujitsu
      Outdoor unit modelAOUH12KUAS1
      SeriesAIRSTAGE H-series
      TypeMini-split heat pump
      Nominal size12,000 BTU
      CompressorVariable-speed units run longer at low powerContinuously variable
      RefrigerantR-32
      Connected (smart) capableNo
      On the market sinceSeptember 10, 2024
      Last certifiedApril 17, 2026
      Cooling
      SEER2Seasonal efficiency, higher is better23.7 (range 19.1-23.7)
      EER2Efficiency at 95°F outdoors12.7-14.1
      Cooling capacity12,000 BTU/h
      Heating
      HSPF2Seasonal efficiency, higher is better10.3-11.5
      Capacity at 47°F16,000 BTU/h
      Capacity at 17°F10,600-10,700 BTU/h
      Capacity at 5°F15,500-16,100 BTU/h
      COP at 5°F2.0 = twice as efficient as a space heater2.02-2.06
      ENERGY STAR cold climateYes
      Heating output as it gets colder97% kept at 5°F

      Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with ACUH12KUAS 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.
      ACUH12KUAS FUJITSU · cold climate23.714.111.515,500215434546
      AMUH12KUAS FUJITSU · cold climate19.913.010.316,100217290592
      ARUH12KUAS FUJITSU · cold climate19.112.710.515,500215434556
      Yearly running cost in 10 large cities$241-$832

      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 AOUH12KUAS1?
      The Fujitsu AOUH12KUAS1 is rated at up to 23.7 SEER2 and 14.1 EER2 for cooling and up to 11.5 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 3 certified matchups SEER2 ranges from 19.1-23.7.
      Is the Fujitsu AOUH12KUAS1 good for cold climates?
      Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 16,100 BTU/h at 5°F with a COP of 2.06, so it is still 2.1 times as efficient as electric resistance heat at that temperature.
      How much does the Fujitsu AOUH12KUAS1 cost to run per year?
      At its rated efficiency it costs about $241-$832 a year in electricity in large U.S. cities, depending on climate and local rates - for example $323 in Phoenix and $715 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 AOUH12KUAS1?
      ENERGY STAR lists 3 certified combinations for this outdoor unit. The highest-rated ones use FUJITSU ACUH12KUAS, FUJITSU AMUH12KUAS, FUJITSU ARUH12KUAS.
      What refrigerant does the Fujitsu AOUH12KUAS1 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 $334/yrYou save $350/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 AOUH12KUAS1
      3. What it replaces
      4. Price replace the example with your quote
      Heat pump, per year
      $334
      Current system, per year
      $684
      You save per year
      $350
      Payback
      12.9 years
      Net after 10 years
      -$999

      Cooling $178Heating $156Electricity used: 2,088 kWhSaved vs. a minimum-efficiency heat pump: $200

      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 April 17, 2026. How we use the data.