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      48,000 BTU mini-split heat pump · MCD Series

      Midea MO1BU-H48B-2A

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

      Ranks #90 of 146 48,000 BTU mini-splits for cooling efficiency, and costs about $1,288 a year to run in a mixed climate like Atlanta.

      SEER2
      19.8 Cooling efficiency over a season
      Below average · beats 14%
      HSPF2
      10.2 Heating efficiency over a season
      Average · beats 53%
      EER2
      9.5 Cooling efficiency on a 95°F day
      Below average · beats 3%
      Heat at 5°F
      40,500 BTU/h77% of its 47°F output
      Very good · beats 71%

      A good fit if…

      • Your winters get properly cold - it is ENERGY STAR cold-climate certified, with 40,500 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-454B
      General
      BrandMidea
      Also sold asAI AIR CONDITIONING, ComfortStar, Mitsutomo
      Outdoor unit modelMO1BU-H48B-2A
      SeriesMCD Series
      TypeMini-split heat pump
      Nominal size48,000 BTU
      CompressorVariable-speed units run longer at low powerContinuously variable
      RefrigerantR-454B
      Connected (smart) capableNo
      On the market sinceSeptember 5, 2024
      Last certifiedMarch 13, 2025
      Cooling
      SEER2Seasonal efficiency, higher is better19.8 (range 17.1-19.8)
      EER2Efficiency at 95°F outdoors9.5-10.0
      Cooling capacity48,000 BTU/h
      Heating
      HSPF2Seasonal efficiency, higher is better9.8-10.2
      Capacity at 47°F50,000 BTU/h
      Capacity at 17°F36,600-40,000 BTU/h
      Capacity at 5°F35,200-40,500 BTU/h
      COP at 5°F2.0 = twice as efficient as a space heater1.90-2.11
      ENERGY STAR cold climateYes
      Heating output as it gets colder77% kept at 5°F

      Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with MFBHS-H48B-2A 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.
      MFBHS-H48B-2A MIDEA · cold climate19.89.510.238,500215471438
      MCDHS-H48B-2A MIDEA · cold climate19.09.59.940,500215471394
      MASHS-H48B-2A · cold climate17.710.010.035,200215471349
      MDHHS-H48B-2A MIDEA · cold climate17.110.09.838,000215471420
      Same unit, other model numbers4

      These model numbers have exactly the same certified ratings and matchups as the Midea MO1BU-H48B-2A: the same equipment under another brand, or a variant code for voltage, colour or market. Everything on this page applies to them.

      Yearly running cost in 10 large cities$1,140-$3,087

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

      Questions6
      What is the SEER2 rating of the Midea MO1BU-H48B-2A?
      The Midea MO1BU-H48B-2A is rated at up to 19.8 SEER2 and 9.5 EER2 for cooling and up to 10.2 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 4 certified matchups SEER2 ranges from 17.1-19.8.
      Is the Midea MO1BU-H48B-2A good for cold climates?
      Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 40,500 BTU/h at 5°F with a COP of 2.11, so it is still 2.1 times as efficient as electric resistance heat at that temperature.
      How much does the Midea MO1BU-H48B-2A cost to run per year?
      At its rated efficiency it costs about $1,140-$3,087 a year in electricity in large U.S. cities, depending on climate and local rates - for example $1,411 in Phoenix and $2,583 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.
      Is the Midea MO1BU-H48B-2A the same as the Midea MOE30-48HFN10-M2P?
      Yes, as far as the certified ratings go. ENERGY STAR lists 5 model numbers with identical efficiency, capacity and matchups, which means the same outdoor unit sold under a different brand or with a minor variant code (voltage, colour or region). The full list is on this page.
      Which indoor units work with the Midea MO1BU-H48B-2A?
      ENERGY STAR lists 4 certified combinations for this outdoor unit. The highest-rated ones use MIDEA MFBHS-H48B-2A, MIDEA MCDHS-H48B-2A, MASHS-H48B-2A.
      What refrigerant does the Midea MO1BU-H48B-2A 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 $1,402/yrYou save $1,105/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 Midea MO1BU-H48B-2A
      3. What it replaces
      4. Price replace the example with your quote
      Heat pump, per year
      $1,402
      Current system, per year
      $2,508
      You save per year
      $1,105
      Payback
      16.3 years
      Net after 10 years
      -$6,946

      Cooling $853Heating $549Electricity used: 8,765 kWhSaved vs. a minimum-efficiency heat pump: $526

      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 March 13, 2025. How we use the data.