What is the SEER2 rating of the MDV MOX230-12HFN10-M1?

The MDV MOX230-12HFN10-M1 is rated at up to 25.5 SEER2 and 13.1 EER2 for cooling and up to 11.5 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 14 certified matchups SEER2 ranges from 19.0-25.5.

Is the MDV MOX230-12HFN10-M1 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 MDV MOX230-12HFN10-M1 cost to run per year?

At its rated efficiency it costs about $222-$646 a year in electricity in large U.S. cities, depending on climate and local rates - for example $281 in Phoenix and $545 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 MOX230-12HFN10-M1?

ENERGY STAR lists 14 certified combinations for this outdoor unit. The highest-rated ones use MSEPBM-12HRFN10-M1, MSEPBM-12HRFN10-M1-D, MFA2M-12HRFN10-M1.

12,000 BTU mini-split heat pump · MSEP Series

MDV MOX230-12HFN10-M1

Very good cooling and heating efficiency for a 12,000 BTU mini-split heat pump, and certified for cold climates.

Ranks #46 of 394 12,000 BTU mini-splits for cooling efficiency, and costs about $265 a year to run in a mixed climate like Atlanta.

SEER2: 25.5 Cooling efficiency over a season
Very good · beats 88%
HSPF2: 11.5 Heating efficiency over a season
Very good · beats 84%
EER2: 13.1 Cooling efficiency on a 95°F day
Average · beats 68%
Heat at 5°F: 8,900 BTU/h70% of its 47°F output
Excellent · 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 84% 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.

Calculate my running cost

Details

Specifications12,000 BTU, R-454B

General
Brand	MDV
Outdoor unit model	MOX230-12HFN10-M1
Series	MSEP 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	February 4, 2024
Last certified	May 6, 2026
Cooling
SEER2Seasonal efficiency, higher is better	25.5 (range 19.0-25.5)
EER2Efficiency at 95°F outdoors	11.7-13.1
Cooling capacity	11,500-12,000 BTU/h
Heating
HSPF2Seasonal efficiency, higher is better	10.0-11.5
Capacity at 47°F	12,000 BTU/h
Capacity at 17°F	8,500-10,400 BTU/h
Capacity at 5°F	8,400-8,900 BTU/h
COP at 5°F2.0 = twice as efficient as a space heater	2.20-2.50
ENERGY STAR cold climate	Yes

Heating output as it gets colder70% kept at 5°F

Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with MSEPBM-12HRFN10-M1 at the standard test temperatures, in BTU/h:

Certified matchups14 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.
MSEPBM-12HRFN10-M1 · cold climate	25.5	13.1	10.7	8,400	214855440
MSEPBM-12HRFN10-M1-D · cold climate	25.5	13.0	10.6	8,400	214855520
MFA2M-12HRFN10-M1 · cold climate	24.7	12.7	11.0	8,900	214855443
MFA2M-12HRFN10-M1-D · cold climate	24.6	12.7	11.0	8,900	214855523
MSAG11BM-12HRFN10-M1 · cold climate	23.1	12.2	11.5	8,600	214855439
MSAB3BM-12HRFN10-M1 · cold climate	23.1	12.2	10.2	8,400	214855438
MCBM-12HRFN10-M1 · cold climate	22.2	12.3	10.1	8,600	214855441
MCBM-12HRFN10-M1-D · cold climate	22.1	12.3	10.0	8,600	214855521
MCA4M-12HRFN10-M1 · cold climate	21.2	12.5	10.4	8,400	214855442
MCA4M-12HRFN10-M1-D · cold climate	21.1	12.5	10.4	8,400	214855522
MTJM-12HWFN10-M1-D · cold climate	19.5	12.0	10.5	8,900	214861950
MTJM-12HWFN10-M1 · cold climate	19.5	12.0	10.5	8,900	214861932
MTIM-12HWFN10-M1 · cold climate	19.0	11.7	10.3	8,800	214855444
MTIM-12HWFN10-M1-D · cold climate	19.0	11.7	10.2	8,800	214861949

Yearly running cost in 10 large cities$222-$646

Phoenix, AZ$281/yr
Miami, FL$222/yr
Houston, TX$252/yr
Atlanta, GA$265/yr
Los Angeles, CA$260/yr
New York, NY$646/yr
Chicago, IL$527/yr
Denver, CO$440/yr
Seattle, WA$272/yr
Minneapolis, MN$545/yr

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 MOX230-12HFN10-M1?: The MDV MOX230-12HFN10-M1 is rated at up to 25.5 SEER2 and 13.1 EER2 for cooling and up to 11.5 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 14 certified matchups SEER2 ranges from 19.0-25.5.
Is the MDV MOX230-12HFN10-M1 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 MDV MOX230-12HFN10-M1 cost to run per year?: At its rated efficiency it costs about $222-$646 a year in electricity in large U.S. cities, depending on climate and local rates - for example $281 in Phoenix and $545 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 MOX230-12HFN10-M1?: ENERGY STAR lists 14 certified combinations for this outdoor unit. The highest-rated ones use MSEPBM-12HRFN10-M1, MSEPBM-12HRFN10-M1-D, MFA2M-12HRFN10-M1.
What refrigerant does the MDV MOX230-12HFN10-M1 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 $283/yrYou save $336/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 MOX230-12HFN10-M1

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: $283
Current system, per year: $619
You save per year: $336
Payback: 13.4 years
Net after 10 years: -$1,138

Cooling $166Heating $117Electricity used: 1,766 kWhSaved vs. a minimum-efficiency heat pump: $192

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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Cooper&Hunter CH-RES12-230VO · cold climate25.5 SEER2 · 11.5 HSPF2
LG KUSAL121A · cold climate25.5 SEER2 · 11.2 HSPF2
CanAir 4C25SCH12H21 · cold climate25.5 SEER2 · 11.5 HSPF2
AC Pro MHPC-H-012BSB · cold climate25.5 SEER2 · 11.0 HSPF2
ACIQ ACIQ-12ZS-HP230C · cold climate25.5 SEER2 · 11.5 HSPF2
Arcoaire D5CSRAH12AAK · cold climate25.5 SEER2 · 11.0 HSPF2

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.