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      9,000 BTU mini-split heat pump · AORAKI

      TOSOT SU-AORAKI9-230/O

      Excellent cooling efficiency and average heating efficiency for a 9,000 BTU mini-split heat pump, and certified for cold climates.

      Ranks #137 of 395 9,000 BTU mini-splits for cooling efficiency, and costs about $236 a year to run in a mixed climate like Atlanta.

      SEER2
      26.0 Cooling efficiency over a season
      Excellent · beats 91%
      HSPF2
      10.4 Heating efficiency over a season
      Average · beats 57%
      EER2
      15.0 Cooling efficiency on a 95°F day
      Excellent · beats 91%
      Heat at 5°F
      9,500 BTU/h90% of its 47°F output
      Below average · beats 33%

      A good fit if…

      • You want low cooling bills - its SEER2 beats 91% of mini-splits.
      • Your winters get properly cold - it is ENERGY STAR cold-climate certified, with 9,500 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

      Specifications9,000 BTU, R-32
      General
      BrandTOSOT
      Outdoor unit modelSU-AORAKI9-230/O
      SeriesAORAKI
      TypeMini-split heat pump
      Nominal size9,000 BTU
      CompressorVariable-speed units run longer at low powerContinuously variable
      RefrigerantR-32
      Connected (smart) capableNo
      On the market sinceJanuary 10, 2024
      Last certifiedJune 29, 2026
      Cooling
      SEER2Seasonal efficiency, higher is better26.0 (range 24.0-26.0)
      EER2Efficiency at 95°F outdoors15.0
      Cooling capacity9,100 BTU/h
      Heating
      HSPF2Seasonal efficiency, higher is better9.2-10.4
      Capacity at 47°F10,500 BTU/h
      Capacity at 17°F8,800-11,000 BTU/h
      Capacity at 5°F7,600-9,500 BTU/h
      COP at 5°F2.0 = twice as efficient as a space heater1.88-1.94
      ENERGY STAR cold climateYes
      Heating output as it gets colder90% kept at 5°F

      Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with SU-AORAKI9-230/I at the standard test temperatures, in BTU/h:

      Certified matchups2 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.
      SU-AORAKI9-230/I · cold climate26.015.010.49,500217023700
      SU-AORAKI9C/I · cold climate24.015.09.27,600218636300
      Yearly running cost in 10 large cities$167-$600

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

      Questions5
      What is the SEER2 rating of the TOSOT SU-AORAKI9-230/O?
      The TOSOT SU-AORAKI9-230/O is rated at up to 26.0 SEER2 and 15.0 EER2 for cooling and up to 10.4 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 2 certified matchups SEER2 ranges from 24.0-26.0.
      Is the TOSOT SU-AORAKI9-230/O good for cold climates?
      Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 9,500 BTU/h at 5°F with a COP of 1.94, so it is still 1.9 times as efficient as electric resistance heat at that temperature.
      How much does the TOSOT SU-AORAKI9-230/O cost to run per year?
      At its rated efficiency it costs about $167-$600 a year in electricity in large U.S. cities, depending on climate and local rates - for example $227 in Phoenix and $517 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 TOSOT SU-AORAKI9-230/O?
      ENERGY STAR lists 2 certified combinations for this outdoor unit. The highest-rated ones use SU-AORAKI9-230/I, SU-AORAKI9C/I.
      What refrigerant does the TOSOT SU-AORAKI9-230/O 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 $236/yrYou save $256/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 TOSOT SU-AORAKI9-230/O
      3. What it replaces
      4. Price replace the example with your quote
      Heat pump, per year
      $236
      Current system, per year
      $492
      You save per year
      $256
      Payback
      13.7 years
      Net after 10 years
      -$942

      Cooling $123Heating $113Electricity used: 1,477 kWhSaved vs. a minimum-efficiency heat pump: $145

      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 June 29, 2026. How we use the data.