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      9,000 BTU mini-split heat pump · MCBU series

      MDV MOX230-09HFN1-MW5W

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

      Ranks #97 of 395 9,000 BTU mini-splits for cooling efficiency, and costs about $188 a year to run in a mixed climate like Atlanta.

      SEER2
      26.5 Cooling efficiency over a season
      Excellent · beats 93%
      HSPF2
      13.6 Heating efficiency over a season
      Excellent · beats 97%
      EER2
      15.8 Cooling efficiency on a 95°F day
      Excellent · beats 95%
      Heat at 5°F
      8,000 BTU/h107% of its 47°F output
      Very good · beats 89%

      A good fit if…

      • You want low cooling bills - its SEER2 beats 93% of mini-splits.
      • Your winters get properly cold - it is ENERGY STAR cold-climate certified, with 8,000 BTU/h at 5°F.
      • It will heat most of the year - its HSPF2 beats 97% of mini-splits.
      • 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

      Specifications9,000 BTU, R-410A
      General
      BrandMDV
      Also sold asECO-AIR, Alsetria, Midea
      Outdoor unit modelMOX230-09HFN1-MW5W
      SeriesMCBU series
      TypeMini-split heat pump
      Nominal size9,000 BTU
      CompressorVariable-speed units run longer at low powerContinuously variable
      RefrigerantR-410A
      Connected (smart) capableNo
      On the market sinceNovember 4, 2020
      Last certifiedApril 27, 2026
      Cooling
      SEER2Seasonal efficiency, higher is better26.5 (range 19.2-26.5)
      EER2Efficiency at 95°F outdoors12.5-15.8
      Cooling capacity6,000-9,000 BTU/h
      Heating
      HSPF2Seasonal efficiency, higher is better10.0-13.6
      Capacity at 47°F7,000-11,000 BTU/h
      Capacity at 17°F5,700-8,500 BTU/h
      Capacity at 5°F7,100-8,000 BTU/h
      COP at 5°F2.0 = twice as efficient as a space heater1.84-2.34
      ENERGY STAR cold climateYes
      Heating output as it gets colder107% kept at 5°F

      Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with MSEPB-06HRFN1-MY5W at the standard test temperatures, in BTU/h:

      Certified matchups23 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.
      MSEPB-06HRFN1-MY5W · cold climate26.515.813.67,500207178564
      MSEPB-06HRFN1-MY5W ECO-AIR · cold climate26.515.813.67,500208121863
      MSEPB-06HRFN1-MY5W Alsetria · cold climate26.515.813.67,500208121900
      MSEPB-09HRFN1-MY5W(GA) · cold climate25.515.012.37,500206369558
      MSEPB-09HRFN1-MY5W(GA) ECO-AIR · cold climate25.515.012.37,500208121859
      MSEPB-09HRFN1-MY5W(GA) Alsetria · cold climate25.515.012.37,500208121896
      MSEPB-09HRFN1-MY5W(GA) MIDEA · cold climate25.515.012.37,500207826693
      MSAG11B-09HRFN1-MX7W(GA) · cold climate24.014.711.67,500207215956
      MSAG11B-09HRFN1-MX7W(GA) MIDEA · cold climate24.014.711.67,500207821930
      MSABB-09HRFN1-MX0W · cold climate24.014.011.47,800207591144
      MSAG11A-06HRFN1-MU0W · cold climate23.515.012.07,100207178565
      MCBU-09HRFN1-MW0W · cold climate22.513.011.57,700209270209
      MCBU-09HRFN1-MU0-CA · cold climate22.014.510.88,000210857291
      MCBU-06HRFN1-MV0W · cold climate22.014.510.88,000209270213
      MCBU-06HRFN1-MV0W ECO-AIR · cold climate22.014.510.88,000211644092
      MCBU-06HRFN1-MV0W Alsetria · cold climate22.014.510.88,000211644098
      MCA3U-09HRFN1-M(C) · cold climate20.013.010.07,400206330118
      CCA3U-09HRFN1-M(C) Alsetria · cold climate20.013.010.07,400211644031
      CCA3U-09HRFN1-M(C) ECO-AIR · cold climate20.013.010.07,400211644056
      CCA3U-09HRFN1-M(C) MIDEA · cold climate20.013.010.07,400208568353
      MTIU-09HWFN1-M · cold climate19.212.510.28,000206330121
      MTIU-09HWFN1-M Alsetria · cold climate19.212.510.28,000211644024
      MTIU-09HWFN1-M ECO-AIR · cold climate19.212.510.28,000211644049
      Yearly running cost in 10 large cities$160-$457

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

      Questions5
      What is the SEER2 rating of the MDV MOX230-09HFN1-MW5W?
      The MDV MOX230-09HFN1-MW5W is rated at up to 26.5 SEER2 and 15.8 EER2 for cooling and up to 13.6 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 23 certified matchups SEER2 ranges from 19.2-26.5.
      Is the MDV MOX230-09HFN1-MW5W good for cold climates?
      Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 8,000 BTU/h at 5°F with a COP of 2.34, so it is still 2.3 times as efficient as electric resistance heat at that temperature.
      How much does the MDV MOX230-09HFN1-MW5W cost to run per year?
      At its rated efficiency it costs about $160-$457 a year in electricity in large U.S. cities, depending on climate and local rates - for example $201 in Phoenix and $385 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 MDV MOX230-09HFN1-MW5W?
      ENERGY STAR lists 23 certified combinations for this outdoor unit. The highest-rated ones use MSEPB-06HRFN1-MY5W, ECO-AIR MSEPB-06HRFN1-MY5W, Alsetria MSEPB-06HRFN1-MY5W.
      What refrigerant does the MDV MOX230-09HFN1-MW5W 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 $202/yrYou save $279/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 MDV MOX230-09HFN1-MW5W
      3. What it replaces
      4. Price replace the example with your quote
      Heat pump, per year
      $202
      Current system, per year
      $480
      You save per year
      $279
      Payback
      12.6 years
      Net after 10 years
      -$715

      Cooling $120Heating $82Electricity used: 1,262 kWhSaved vs. a minimum-efficiency heat pump: $169

      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 27, 2026. How we use the data.