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      30,000 BTU mini-split heat pump · MSG Series

      Midea MO1BS-H30B-2A

      Average cooling efficiency and below average heating efficiency for a 30,000 BTU mini-split heat pump, but not rated for cold climates.

      Ranks #64 of 171 30,000 BTU mini-splits for cooling efficiency, and costs about $787 a year to run in a mixed climate like Atlanta.

      SEER2
      22.3 Cooling efficiency over a season
      Average · beats 53%
      HSPF2
      9.5 Heating efficiency over a season
      Below average · beats 24%
      EER2
      12.0 Cooling efficiency on a 95°F day
      Below average · beats 25%
      Heat at 5°F
      20,400 BTU/h67% of its 47°F output
      Average · beats 67%

      A good fit if…

      • You want steady temperatures and quiet running - the compressor varies its speed.

      Think twice if…

      • You often see nights below 0°F - it is not cold-climate certified.
      • You mainly need heat - its HSPF2 is below average for mini-splits.

      Calculate my running cost

      Details

      Specifications30,000 BTU, R-454B
      General
      BrandMidea
      Outdoor unit modelMO1BS-H30B-2A
      SeriesMSG Series
      TypeMini-split heat pump
      Nominal size30,000 BTU
      CompressorVariable-speed units run longer at low powerContinuously variable
      RefrigerantR-454B
      Connected (smart) capableNo
      On the market sinceSeptember 5, 2024
      Last certifiedNovember 24, 2025
      Cooling
      SEER2Seasonal efficiency, higher is better22.3 (range 17.0-22.3)
      EER2Efficiency at 95°F outdoors11.0-12.0
      Cooling capacity30,000 BTU/h
      Heating
      HSPF2Seasonal efficiency, higher is better8.7-9.5
      Capacity at 47°F30,000 BTU/h
      Capacity at 17°F19,400-20,400 BTU/h
      Capacity at 5°F20,000-20,400 BTU/h
      COP at 5°F2.0 = twice as efficient as a space heater1.94-2.10
      ENERGY STAR cold climateNo
      Heating output as it gets colder67% kept at 5°F

      Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with MSGNS-H30B-2A 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.
      MSGNS-H30B-2A MIDEA22.312.09.020,000215471371
      MSEEU-H30B-2A MIDEA20.512.09.520,000216607255
      MACHU-H30B-2A17.011.08.720,400215471357
      Yearly running cost in 10 large cities$636-$1,936

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

      Questions5
      What is the SEER2 rating of the Midea MO1BS-H30B-2A?
      The Midea MO1BS-H30B-2A is rated at up to 22.3 SEER2 and 12.0 EER2 for cooling and up to 9.5 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 3 certified matchups SEER2 ranges from 17.0-22.3.
      Is the Midea MO1BS-H30B-2A good for cold climates?
      It is not cold-climate certified: none of its matchups meet the ENERGY STAR cold-climate criteria (a COP of at least 1.75 at 5°F among other limits). In places with frequent sub-zero nights, pick a cold-climate 30,000 BTU model.
      How much does the Midea MO1BS-H30B-2A cost to run per year?
      At its rated efficiency it costs about $636-$1,936 a year in electricity in large U.S. cities, depending on climate and local rates - for example $817 in Phoenix and $1,643 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 Midea MO1BS-H30B-2A?
      ENERGY STAR lists 3 certified combinations for this outdoor unit. The highest-rated ones use MIDEA MSGNS-H30B-2A, MIDEA MSEEU-H30B-2A, MACHU-H30B-2A.
      What refrigerant does the Midea MO1BS-H30B-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 $827/yrYou save $720/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 MO1BS-H30B-2A
      3. What it replaces
      4. Price replace the example with your quote
      Heat pump, per year
      $827
      Current system, per year
      $1,547
      You save per year
      $720
      Payback
      16.0 years
      Net after 10 years
      -$4,304

      Cooling $474Heating $354Electricity used: 5,170 kWhSaved vs. a minimum-efficiency heat pump: $359

      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 November 24, 2025. How we use the data.