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      9,000 BTU mini-split heat pump · MSAB Series

      MDV MOX230-09HFN10-B1

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

      Ranks #157 of 395 9,000 BTU mini-splits for cooling efficiency, and costs about $224 a year to run in a mixed climate like Atlanta.

      SEER2
      25.5 Cooling efficiency over a season
      Very good · beats 88%
      HSPF2
      10.7 Heating efficiency over a season
      Average · beats 68%
      EER2
      14.5 Cooling efficiency on a 95°F day
      Very good · beats 88%
      Heat at 5°F
      7,300 BTU/h72% of its 47°F output
      Very good · beats 82%

      A good fit if…

      • You want low cooling bills - its SEER2 beats 88% of mini-splits.
      • Your winters get properly cold - it is ENERGY STAR cold-climate certified, with 7,300 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-454B
      General
      BrandMDV
      Outdoor unit modelMOX230-09HFN10-B1
      SeriesMSAB Series
      TypeMini-split heat pump
      Nominal size9,000 BTU
      CompressorVariable-speed units run longer at low powerContinuously variable
      RefrigerantR-454B
      Connected (smart) capableNo
      On the market sinceFebruary 4, 2024
      Last certifiedMay 6, 2026
      Cooling
      SEER2Seasonal efficiency, higher is better25.5 (range 24.5-25.5)
      EER2Efficiency at 95°F outdoors14.0-15.0
      Cooling capacity9,000 BTU/h
      Heating
      HSPF2Seasonal efficiency, higher is better10.0-10.7
      Capacity at 47°F10,000 BTU/h
      Capacity at 17°F8,500-9,400 BTU/h
      Capacity at 5°F7,000-7,300 BTU/h
      COP at 5°F2.0 = twice as efficient as a space heater2.09-2.23
      ENERGY STAR cold climateYes
      Heating output as it gets colder72% kept at 5°F

      Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with MSEPB-09HRFN10-B1 at the standard test temperatures, in BTU/h:

      Certified matchups4 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-09HRFN10-B1 · cold climate25.514.510.07,200214855424
      MSEPB-09HRFN10-B1-D · cold climate25.414.510.07,200214855511
      MSAB3B-09HRFN10-B1 · cold climate25.014.010.07,000214855422
      MSAG11B-09HRFN10-B1 · cold climate24.515.010.77,300214855423
      Yearly running cost in 10 large cities$168-$562

      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 MOX230-09HFN10-B1?
      The MDV MOX230-09HFN10-B1 is rated at up to 25.5 SEER2 and 14.5 EER2 for cooling and up to 10.7 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 4 certified matchups SEER2 ranges from 24.5-25.5.
      Is the MDV MOX230-09HFN10-B1 good for cold climates?
      Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 7,300 BTU/h at 5°F with a COP of 2.23, so it is still 2.2 times as efficient as electric resistance heat at that temperature.
      How much does the MDV MOX230-09HFN10-B1 cost to run per year?
      At its rated efficiency it costs about $168-$562 a year in electricity in large U.S. cities, depending on climate and local rates - for example $222 in Phoenix and $482 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 MOX230-09HFN10-B1?
      ENERGY STAR lists 4 certified combinations for this outdoor unit. The highest-rated ones use MSEPB-09HRFN10-B1, MSEPB-09HRFN10-B1-D, MSAB3B-09HRFN10-B1.
      What refrigerant does the MDV MOX230-09HFN10-B1 use?
      It uses R-454B.

      Running cost and savings

      Pre-filled with this model. Pick your city and what you heat with today; everything else is optional.

      Heat pump $229/yrYou save $252/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 MOX230-09HFN10-B1
      3. What it replaces
      4. Price replace the example with your quote
      Heat pump, per year
      $229
      Current system, per year
      $480
      You save per year
      $252
      Payback
      13.9 years
      Net after 10 years
      -$985

      Cooling $124Heating $105Electricity used: 1,431 kWhSaved vs. a minimum-efficiency heat pump: $142

      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 May 6, 2026. How we use the data.