What is the SEER2 rating of the MDV MOX330-09HFN1-MY5W?

The MDV MOX330-09HFN1-MY5W is rated at up to 28.1 SEER2 and 16.2 EER2 for cooling and up to 12.4 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 16 certified matchups SEER2 ranges from 20.2-28.1.

Is the MDV MOX330-09HFN1-MY5W good for cold climates?

Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 11,000 BTU/h at 5°F with a COP of 2.00, so it is still 2.0 times as efficient as electric resistance heat at that temperature.

How much does the MDV MOX330-09HFN1-MY5W cost to run per year?

At its rated efficiency it costs about $152-$526 a year in electricity in large U.S. cities, depending on climate and local rates - for example $204 in Phoenix and $452 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 MOX330-09HFN1-MY5W?

ENERGY STAR lists 16 certified combinations for this outdoor unit. The highest-rated ones use MSEPB-09HRFN1-MY5W(GA), ECO-AIR MSEPB-09HRFN1-MY5W(GA), Alsetria MSEPB-09HRFN1-MY5W(GA).

What refrigerant does the MDV MOX330-09HFN1-MY5W 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.

9,000 BTU mini-split heat pump · MCBU series

MDV MOX330-09HFN1-MY5W

Excellent cooling and heating efficiency for a 9,000 BTU mini-split heat pump, and certified for cold climates.

Ranks #43 of 395 9,000 BTU mini-splits for cooling efficiency, and costs about $208 a year to run in a mixed climate like Atlanta.

SEER2: 28.1 Cooling efficiency over a season
Excellent · beats 97%
HSPF2: 12.4 Heating efficiency over a season
Excellent · beats 93%
EER2: 16.2 Cooling efficiency on a 95°F day
Excellent · beats 97%
Heat at 5°F: 11,000 BTU/h88% of its 47°F output
Average · beats 48%

A good fit if…

You want low cooling bills - its SEER2 beats 97% of mini-splits.
Your winters get properly cold - it is ENERGY STAR cold-climate certified, with 11,000 BTU/h at 5°F.
It will heat most of the year - its HSPF2 beats 93% of mini-splits.
You want steady temperatures and quiet running - the compressor varies its speed.

Think twice if…

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

Calculate my running cost

Details

Specifications9,000 BTU, R-410A

General
Brand	MDV
Also sold as	ECO-AIR, Alsetria
Outdoor unit model	MOX330-09HFN1-MY5W
Series	MCBU series
Type	Mini-split heat pump
Nominal size	9,000 BTU
CompressorVariable-speed units run longer at low power	Continuously variable
Refrigerant	R-410A
Connected (smart) capable	No
On the market since	August 20, 2020
Last certified	June 25, 2026
Cooling
SEER2Seasonal efficiency, higher is better	28.1 (range 20.2-28.1)
EER2Efficiency at 95°F outdoors	13.0-16.2
Cooling capacity	9,000 BTU/h
Heating
HSPF2Seasonal efficiency, higher is better	10.0-12.4
Capacity at 47°F	9,800-12,000 BTU/h
Capacity at 17°F	7,100-10,100 BTU/h
Capacity at 5°F	9,800-11,000 BTU/h
COP at 5°F2.0 = twice as efficient as a space heater	1.59-2.00
ENERGY STAR cold climate	Yes

Heating output as it gets colder88% kept at 5°F

Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with MSEPB-09HRFN1-MY5W(GA) at the standard test temperatures, in BTU/h:

Certified matchups16 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.
MSEPB-09HRFN1-MY5W(GA) · cold climate	28.1	16.2	11.5	10,600	205993845
MSEPB-09HRFN1-MY5W(GA) ECO-AIR · cold climate	28.1	16.2	11.5	10,600	208121864
MSEPB-09HRFN1-MY5W(GA) Alsetria · cold climate	28.1	16.2	11.5	10,600	208121901
MSAG11B-09HRFN1-MX7W(GA) · cold climate	26.4	15.8	11.6	11,000	206361860
CS11M-09HRFN1-MX0W(A)	25.0	15.6	11.0	9,800	205993852
MCBU-09HRFN1-MU0-CA · cold climate	24.0	13.0	12.4	10,500	210857289
MCBU-09HRFN1-MW0W · cold climate	24.0	13.0	12.4	10,500	209270210
MCBU-09HRFN1-MW0W ECO-AIR · cold climate	24.0	13.0	12.4	10,500	211644093
MCBU-09HRFN1-MW0W Alsetria · cold climate	24.0	13.0	12.4	10,500	211644099
MCA3U-09HRFN1-M(C) · cold climate	20.5	13.0	10.3	10,000	206330122
CCA3U-09HRFN1-M(C) Alsetria · cold climate	20.5	13.0	10.3	10,000	211644043
CCA3U-09HRFN1-M(C) ECO-AIR · cold climate	20.5	13.0	10.3	10,000	211644068
MTI-09HWFN1-MSS8 · cold climate	20.5	13.6	10.0	10,800	210299303
MTIU-09HWFN1-M · cold climate	20.2	13.2	12.0	10,800	206330123
MTIU-09HWFN1-M Alsetria · cold climate	20.2	13.2	12.0	10,800	211644037
MTIU-09HWFN1-M ECO-AIR · cold climate	20.2	13.2	12.0	10,800	211644062

Yearly running cost in 10 large cities$152-$526

Phoenix, AZ$204/yr
Miami, FL$152/yr
Houston, TX$184/yr
Atlanta, GA$208/yr
Los Angeles, CA$208/yr
New York, NY$526/yr
Chicago, IL$432/yr
Denver, CO$364/yr
Seattle, WA$227/yr
Minneapolis, MN$452/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 MOX330-09HFN1-MY5W?: The MDV MOX330-09HFN1-MY5W is rated at up to 28.1 SEER2 and 16.2 EER2 for cooling and up to 12.4 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 16 certified matchups SEER2 ranges from 20.2-28.1.
Is the MDV MOX330-09HFN1-MY5W good for cold climates?: Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 11,000 BTU/h at 5°F with a COP of 2.00, so it is still 2.0 times as efficient as electric resistance heat at that temperature.
How much does the MDV MOX330-09HFN1-MY5W cost to run per year?: At its rated efficiency it costs about $152-$526 a year in electricity in large U.S. cities, depending on climate and local rates - for example $204 in Phoenix and $452 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 MOX330-09HFN1-MY5W?: ENERGY STAR lists 16 certified combinations for this outdoor unit. The highest-rated ones use MSEPB-09HRFN1-MY5W(GA), ECO-AIR MSEPB-09HRFN1-MY5W(GA), Alsetria MSEPB-09HRFN1-MY5W(GA).
What refrigerant does the MDV MOX330-09HFN1-MY5W 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 $211/yrYou save $284/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 MOX330-09HFN1-MY5W

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: $211
Current system, per year: $495
You save per year: $284
Payback: 12.3 years
Net after 10 years: -$660

Cooling $113Heating $98Electricity used: 1,320 kWhSaved vs. a minimum-efficiency heat pump: $173

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 9,000 BTU models

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ComfortStar CHF09CD(O) · cold climate28.1 SEER2 · 12.4 HSPF2
Bosch BMS500-AAS009-1CSXHC · cold climate28.1 SEER2 · 12.0 HSPF2
Carrier 38MARBQ09AA3 · cold climate28.1 SEER2 · 12.4 HSPF2
Comfort-Aire A-VMH09SV-1 · cold climate28.1 SEER2 · 12.0 HSPF2
Breeze33 BZ33-HYP09OUT2-G2-P · cold climate28.1 SEER2 · 12.4 HSPF2
DIRECT AIR DIRM-09HXPRO28-1Z · cold climate28.1 SEER2 · 12.0 HSPF2

See all 395 9,000 BTU mini-splits, ranked

Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of June 25, 2026. How we use the data.