12,000 BTU mini-split heat pump · MSE Series
Midea MO1ES-H12B-2A
Very good cooling and heating efficiency for a 12,000 BTU mini-split heat pump, and certified for cold climates.
Ranks #53 of 394 12,000 BTU mini-splits for cooling efficiency, and costs about $273 a year to run in a mixed climate like Atlanta.
- SEER2
- 25.5 Cooling efficiency over a seasonVery good · beats 88%
- HSPF2
- 11.0 Heating efficiency over a seasonVery good · beats 75%
- EER2
- 13.0 Cooling efficiency on a 95°F dayAverage · beats 62%
- Heat at 5°F
- 8,900 BTU/h70% of its 47°F outputExcellent · beats 97%
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 8,900 BTU/h at 5°F.
- It will heat most of the year - its HSPF2 beats 75% of mini-splits.
- 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.
Details
Specifications
| General | |
|---|---|
| Brand | Midea |
| Also sold as | Blueridge, Innovair |
| Outdoor unit model | MO1ES-H12B-2A |
| Series | MSE Series |
| Type | Mini-split heat pump |
| Nominal size | 12,000 BTU |
| CompressorVariable-speed units run longer at low power | Continuously variable |
| Refrigerant | R-454B |
| Connected (smart) capable | No |
| On the market since | September 5, 2024 |
| Last certified | May 6, 2026 |
| Cooling | |
| SEER2Seasonal efficiency, higher is better | 25.5 (range 19.0-25.5) |
| EER2Efficiency at 95°F outdoors | 11.7-13.0 |
| Cooling capacity | 11,500-12,000 BTU/h |
| Heating | |
| HSPF2Seasonal efficiency, higher is better | 10.0-11.0 |
| Capacity at 47°F | 12,000 BTU/h |
| Capacity at 17°F | 8,500-10,100 BTU/h |
| Capacity at 5°F | 8,400-8,900 BTU/h |
| COP at 5°F2.0 = twice as efficient as a space heater | 2.25-2.50 |
| ENERGY STAR cold climate | Yes |
Heating output as it gets colder
Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with MSEHU-H12B-2A at the standard test temperatures, in BTU/h:
Certified matchups
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 unit | SEER2 | EER2 | HSPF2 | Heat @5°F | AHRI ref. |
|---|---|---|---|---|---|
| MSEHU-H12B-2A MIDEA · cold climate | 25.5 | 13.0 | 10.6 | 8,400 | 215471376 |
| MFAHU-H12B-2A MIDEA · cold climate | 24.6 | 12.7 | 11.0 | 8,900 | 215471430 |
| MCAHU-H12B-2A MIDEA · cold climate | 22.1 | 12.3 | 10.0 | 8,600 | 215471402 |
| MCDHU-H12B-2A MIDEA · cold climate | 21.1 | 12.5 | 10.4 | 8,400 | 215471390 |
| MDHHU-H12B-2A MIDEA · cold climate | 19.5 | 12.0 | 10.5 | 8,900 | 215471416 |
| MDLHU-H12B-2A MIDEA · cold climate | 19.0 | 11.7 | 10.2 | 8,800 | 215471409 |
Same unit, other model numbers
Yearly running cost in 10 large cities
- Phoenix, AZ$285/yr
- Miami, FL$222/yr
- Houston, TX$255/yr
- Atlanta, GA$273/yr
- Los Angeles, CA$269/yr
- New York, NY$670/yr
- Chicago, IL$548/yr
- Denver, CO$458/yr
- Seattle, WA$284/yr
- Minneapolis, MN$568/yr
At each state's average electricity price and the city's typical heating and cooling hours.
Questions
- What is the SEER2 rating of the Midea MO1ES-H12B-2A?
- The Midea MO1ES-H12B-2A is rated at up to 25.5 SEER2 and 13.0 EER2 for cooling and up to 11.0 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 6 certified matchups SEER2 ranges from 19.0-25.5.
- Is the Midea MO1ES-H12B-2A good for cold climates?
- Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 8,900 BTU/h at 5°F with a COP of 2.50, so it is still 2.5 times as efficient as electric resistance heat at that temperature.
- How much does the Midea MO1ES-H12B-2A cost to run per year?
- At its rated efficiency it costs about $222-$670 a year in electricity in large U.S. cities, depending on climate and local rates - for example $285 in Phoenix and $568 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.
- Is the Midea MO1ES-H12B-2A the same as the Blueridge BMS1226YC?
- Yes, as far as the certified ratings go. ENERGY STAR lists 4 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 MO1ES-H12B-2A?
- ENERGY STAR lists 6 certified combinations for this outdoor unit. The highest-rated ones use MIDEA MSEHU-H12B-2A, MIDEA MFAHU-H12B-2A, MIDEA MCAHU-H12B-2A.
- What refrigerant does the Midea MO1ES-H12B-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.
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See all 394 12,000 BTU mini-splits, ranked
Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of May 6, 2026. How we use the data.