What is the SEER2 rating of the MDV M3OJ-27HFN1-M?

The MDV M3OJ-27HFN1-M is rated at up to 24.6 SEER2 and 12.7 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 18 certified matchups SEER2 ranges from 20.0-24.6.

Is the MDV M3OJ-27HFN1-M 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 MDV M3OJ-27HFN1-M cost to run per year?

At its rated efficiency it costs about $540-$1,779 a year in electricity in large U.S. cities, depending on climate and local rates - for example $712 in Phoenix and $1,522 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.

What refrigerant does the MDV M3OJ-27HFN1-M 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.

30,000 BTU mini-split heat pump · MSAG series

MDV M3OJ-27HFN1-M

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

Ranks #12 of 171 30,000 BTU mini-splits for cooling efficiency, and costs about $712 a year to run in a mixed climate like Atlanta.

SEER2: 24.6 Cooling efficiency over a season
Very good · beats 80%
HSPF2: 9.5 Heating efficiency over a season
Below average · beats 24%
EER2: 12.7 Cooling efficiency on a 95°F day
Average · beats 54%
Heat at 5°F: 19,000 BTU/h68% of its 47°F output
Average · beats 48%

A good fit if…

You want low cooling bills - its SEER2 beats 80% of mini-splits.
You want steady temperatures and quiet running - the compressor varies its speed.
You want a choice of indoor units - 18 certified pairings.

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.
You want the newest refrigerant - it uses R-410A, which is being phased down.

Calculate my running cost

Details

Specifications30,000 BTU, R-410A

General
Brand	MDV
Also sold as	ECO-AIR, Alsetria, Midea
Outdoor unit model	M3OJ-27HFN1-M
Series	MSAG series
Type	Mini-split heat pump
Nominal size	30,000 BTU
CompressorVariable-speed units run longer at low power	Continuously variable
Refrigerant	R-410A
Connected (smart) capable	No
On the market since	June 1, 2022
Last certified	April 27, 2026
Cooling
SEER2Seasonal efficiency, higher is better	24.6 (range 20.0-24.6)
EER2Efficiency at 95°F outdoors	11.5-12.7
Cooling capacity	27,000-28,000 BTU/h
Heating
HSPF2Seasonal efficiency, higher is better	8.5-9.5
Capacity at 47°F	27,000-28,000 BTU/h
Capacity at 17°F	19,000-22,000 BTU/h
Capacity at 5°F	16,400-19,000 BTU/h
COP at 5°F2.0 = twice as efficient as a space heater	1.75-2.00
ENERGY STAR cold climate	No

Heating output as it gets colder68% kept at 5°F

Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its best matchup at the standard test temperatures, in BTU/h:

Certified matchups18 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 unit	SEER2	EER2	HSPF2	Heat @5°F	AHRI ref.
-	24.6	12.7	9.5	19,000	206714975
- ECO-AIR	24.6	12.7	9.5	19,000	208121871
- Alsetria	24.6	12.7	9.5	19,000	208121908
-	23.5	12.2	9.2	19,000	207641252
- MIDEA	23.5	12.2	9.2	19,000	207683283
-	22.8	12.2	9.4	18,800	206716989
- ECO-AIR	22.8	12.2	9.4	18,800	208121873
- Alsetria	22.8	12.2	9.4	18,800	208121910
-	22.3	12.0	9.2	18,800	207641254
- MIDEA	22.3	12.0	9.2	18,800	207683284
-	21.0	11.7	9.2	18,700	207641243
-	21.0	11.7	9.2	18,700	206714981
-	21.0	11.7	9.2	18,700	213257499
- ECO-AIR	21.0	11.7	9.2	18,700	208121872
- Alsetria	21.0	11.7	9.2	18,700	208121909
- MIDEA	21.0	11.7	9.2	18,700	207683282
-	20.5	11.6	8.9	17,500	213257505
-	20.0	11.5	8.5	16,400	213257498

Yearly running cost in 10 large cities$540-$1,779

Phoenix, AZ$712/yr
Miami, FL$540/yr
Houston, TX$640/yr
Atlanta, GA$712/yr
Los Angeles, CA$707/yr
New York, NY$1,779/yr
Chicago, IL$1,459/yr
Denver, CO$1,226/yr
Seattle, WA$763/yr
Minneapolis, MN$1,522/yr

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

Questions4

What is the SEER2 rating of the MDV M3OJ-27HFN1-M?: The MDV M3OJ-27HFN1-M is rated at up to 24.6 SEER2 and 12.7 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 18 certified matchups SEER2 ranges from 20.0-24.6.
Is the MDV M3OJ-27HFN1-M 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 MDV M3OJ-27HFN1-M cost to run per year?: At its rated efficiency it costs about $540-$1,779 a year in electricity in large U.S. cities, depending on climate and local rates - for example $712 in Phoenix and $1,522 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.
What refrigerant does the MDV M3OJ-27HFN1-M 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 $731/yrYou save $713/yrSee details ↓

1. Where you live

StateCityElectricity ¢ per kWh

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.

Cooling hours full-load hours per yearHeating hours full-load hours per year

2. The heat pump MDV M3OJ-27HFN1-M

Find a model (fills in the ratings below)

SEER2 cooling efficiencyHSPF2 heating efficiencyCooling capacity BTU/hHeating capacity BTU/h

3. What it replaces

Current heatingFurnace efficiency (AFUE %)Gas price, $/thermCurrent coolingOld AC rating SEER2 (10 ≈ 15+ years old)

4. Price replace the example with your quote

Installed price, $Rebates and incentives, $ utility, state

Heat pump, per year: $731
Current system, per year: $1,444
You save per year: $713
Payback: 14.7 years
Net after 10 years: -$3,370

Cooling $401Heating $330Electricity used: 4,567 kWhSaved vs. a minimum-efficiency heat pump: $377

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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DIYCOOL ES-27Z-M3B24.6 SEER2 · 9.5 HSPF2
Armstrong Air 4DHP2S30M-1P24.6 SEER2 · 9.3 HSPF2
DIRECT AIR DIRM-27DA25-3Z24.6 SEER2 · 9.5 HSPF2
Lennox MPC030S4M-1P24.6 SEER2 · 9.3 HSPF2
C&H CH-28MES-230VO24.6 SEER2 · 9.5 HSPF2
TOSHIBA CARRIER RAV-BP301AT2P-UL · cold climate24.5 SEER2 · 11.8 HSPF2

See all 171 30,000 BTU mini-splits, ranked

Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of April 27, 2026. How we use the data.