What is the SEER2 rating of the MDV MOX230-06HFN10-M1X?

The MDV MOX230-06HFN10-M1X is rated at up to 25.7 SEER2 and 18.0 EER2 for cooling and up to 14.8 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 12 certified matchups SEER2 ranges from 21.4-25.7.

Is the MDV MOX230-06HFN10-M1X good for cold climates?

Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 8,100 BTU/h at 5°F with a COP of 2.40, so it is still 2.4 times as efficient as electric resistance heat at that temperature.

How much does the MDV MOX230-06HFN10-M1X cost to run per year?

At its rated efficiency it costs about $119-$316 a year in electricity in large U.S. cities, depending on climate and local rates - for example $146 in Phoenix and $264 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 MOX230-06HFN10-M1X?

ENERGY STAR lists 12 certified combinations for this outdoor unit. The highest-rated ones use MSEPBM-12HRFN10-M1, MSEPB-06HRFN10-M1, MSEPB-06HRFN10-M1-D.

6,000 BTU mini-split heat pump · MSEP series

MDV MOX230-06HFN10-M1X

Excellent cooling and heating efficiency for a 6,000 BTU mini-split heat pump, and certified for cold climates.

Ranks #21 of 42 6,000 BTU mini-splits for cooling efficiency, and costs about $132 a year to run in a mixed climate like Atlanta.

SEER2: 25.7 Cooling efficiency over a season
Excellent · beats 90%
HSPF2: 14.8 Heating efficiency over a season
Excellent · beats 99%
EER2: 18.0 Cooling efficiency on a 95°F day
Excellent · beats 99%
Heat at 5°F: 8,100 BTU/h110% of its 47°F output
Excellent · beats 93%

A good fit if…

You want low cooling bills - its SEER2 beats 90% of mini-splits.
Your winters get properly cold - it is ENERGY STAR cold-climate certified, with 8,100 BTU/h at 5°F.
It will heat most of the year - its HSPF2 beats 99% 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

Specifications6,000 BTU, R-454B

General
Brand	MDV
Outdoor unit model	MOX230-06HFN10-M1X
Series	MSEP series
Type	Mini-split heat pump
Nominal size	6,000 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	25.7 (range 21.4-25.7)
EER2Efficiency at 95°F outdoors	14.4-18.0
Cooling capacity	6,000-6,500 BTU/h
Heating
HSPF2Seasonal efficiency, higher is better	12.0-14.8
Capacity at 47°F	7,000-8,000 BTU/h
Capacity at 17°F	7,000-8,700 BTU/h
Capacity at 5°F	7,500-8,100 BTU/h
COP at 5°F2.0 = twice as efficient as a space heater	2.30-2.40
ENERGY STAR cold climate	Yes

Heating output as it gets colder110% 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 matchups12 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	25.7	18.0	14.8	7,700	214311114
MSEPB-06HRFN10-M1 · cold climate	25.7	18.0	14.8	7,700	214311115
MSEPB-06HRFN10-M1-D · cold climate	25.5	18.0	14.8	7,700	214855557
MSAG11A-06HRFN10-M1 · cold climate	25.3	16.0	14.6	7,500	214311113
MCBM-12HRFN10-M1-D · cold climate	22.0	15.0	12.0	8,100	214855505
MCB-06HRFN10-M1-D · cold climate	22.0	15.0	12.0	8,100	214855558
MCB-06HRFN10-M1 · cold climate	22.0	15.2	12.0	8,100	214855400
MCBM-12HRFN10-M1 · cold climate	22.0	15.2	12.0	8,100	214855401
MTI-06HWFN10-M1 · cold climate	21.5	14.5	13.8	7,800	214855402
MTIM-12HWFN10-M1 · cold climate	21.5	14.5	13.8	7,800	214861923
MTI-06HWFN10-M1-D · cold climate	21.4	14.4	13.8	7,800	214861934
MTIM-12HWFN10-M1-D · cold climate	21.4	14.4	13.8	7,800	214861935

Yearly running cost in 10 large cities$119-$316

Phoenix, AZ$146/yr
Miami, FL$119/yr
Houston, TX$131/yr
Atlanta, GA$132/yr
Los Angeles, CA$129/yr
New York, NY$316/yr
Chicago, IL$257/yr
Denver, CO$213/yr
Seattle, WA$131/yr
Minneapolis, MN$264/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 MOX230-06HFN10-M1X?: The MDV MOX230-06HFN10-M1X is rated at up to 25.7 SEER2 and 18.0 EER2 for cooling and up to 14.8 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 12 certified matchups SEER2 ranges from 21.4-25.7.
Is the MDV MOX230-06HFN10-M1X good for cold climates?: Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 8,100 BTU/h at 5°F with a COP of 2.40, so it is still 2.4 times as efficient as electric resistance heat at that temperature.
How much does the MDV MOX230-06HFN10-M1X cost to run per year?: At its rated efficiency it costs about $119-$316 a year in electricity in large U.S. cities, depending on climate and local rates - for example $146 in Phoenix and $264 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 MOX230-06HFN10-M1X?: ENERGY STAR lists 12 certified combinations for this outdoor unit. The highest-rated ones use MSEPBM-12HRFN10-M1, MSEPB-06HRFN10-M1, MSEPB-06HRFN10-M1-D.
What refrigerant does the MDV MOX230-06HFN10-M1X 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 $145/yrYou save $205/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 MOX230-06HFN10-M1X

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: $145
Current system, per year: $350
You save per year: $205
Payback: 12.2 years
Net after 10 years: -$451

Cooling $89Heating $56Electricity used: 906 kWhSaved vs. a minimum-efficiency heat pump: $125

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.

Similar 6,000 BTU models

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Blueridge BXS5A06UC0 · cold climate25.5 SEER2 · 14.8 HSPF2
MOOVAIR DMA06HOS28230E8 · cold climate26.5 SEER2 · 13.6 HSPF2
Comfort-Aire A-VHP06SA-1 · cold climate25.5 SEER2 · 14.8 HSPF2
Elios DEA06HOS28230E8 · cold climate26.5 SEER2 · 13.6 HSPF2
Cooper&Hunter CH-RHP06F9-230VO · cold climate25.5 SEER2 · 14.8 HSPF2
Custom Comfort CCOXHASZ06HP · cold climate26.5 SEER2 · 13.6 HSPF2

See all 42 6,000 BTU mini-splits, ranked

Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of May 6, 2026. How we use the data.