What is the SEER2 rating of the MDV MOX630-42HFN10-M3X-D?

The MDV MOX630-42HFN10-M3X-D is rated at up to 16.7 SEER2 and 11.7 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 3 certified matchups SEER2 ranges from 15.7-16.7.

Is the MDV MOX630-42HFN10-M3X-D good for cold climates?

Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 46,000 BTU/h at 5°F with a COP of 1.90, so it is still 1.9 times as efficient as electric resistance heat at that temperature.

How much does the MDV MOX630-42HFN10-M3X-D cost to run per year?

At its rated efficiency it costs about $1,184-$3,293 a year in electricity in large U.S. cities, depending on climate and local rates - for example $1,477 in Phoenix and $2,765 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.

Is the MDV MOX630-42HFN10-M3X-D the same as the ACIQ ACIQ-42-HPD?

Yes, as far as the certified ratings go. ENERGY STAR lists both 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 MDV MOX630-42HFN10-M3X-D?

ENERGY STAR lists 3 certified combinations for this outdoor unit. The highest-rated ones use MVBC-42HWFN10-MD3E-DD, MVBC-48HWFN10-MD3E-DD, MVBM-60C28T6N10.

3.5-ton central heat pump · MVB Series

MDV MOX630-42HFN10-M3X-D

Average cooling efficiency and very good heating efficiency for a 3.5-ton central heat pump, and certified for cold climates.

Ranks #43 of 138 3.5 ton central heat pumps for cooling efficiency, and costs about $1,365 a year to run in a mixed climate like Atlanta.

SEER2: 16.7 Cooling efficiency over a season
Average · beats 43%
HSPF2: 9.5 Heating efficiency over a season
Very good · beats 70%
EER2: 11.7 Cooling efficiency on a 95°F day
Average · beats 43%
Heat at 5°F: 46,000 BTU/h92% of its 47°F output
Below average · beats 20%

A good fit if…

Your winters get properly cold - it is ENERGY STAR cold-climate certified, with 46,000 BTU/h at 5°F.
It will heat most of the year - its HSPF2 beats 70% of central heat pumps.
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

Specifications3.5 ton, R-454B

General
Brand	MDV
Also sold as	ACIQ, 1HVAC
Outdoor unit model	MOX630-42HFN10-M3X-D
Series	MVB Series
Type	Central heat pump
Nominal size	3.5 ton
CompressorVariable-speed units run longer at low power	Continuously variable
Refrigerant	R-454B
Connected (smart) capable	No
On the market since	October 12, 2022
Last certified	September 30, 2026
Cooling
SEER2Seasonal efficiency, higher is better	16.7 (range 15.7-16.7)
EER2Efficiency at 95°F outdoors	10.5-11.7
Cooling capacity	42,000 BTU/h
Heating
HSPF2Seasonal efficiency, higher is better	8.8-9.5
Capacity at 47°F	48,000-50,000 BTU/h
Capacity at 17°F	34,400-39,500 BTU/h
Capacity at 5°F	42,000-46,000 BTU/h
COP at 5°F2.0 = twice as efficient as a space heater	1.85-1.90
ENERGY STAR cold climate	Yes

Heating output as it gets colder92% kept at 5°F

Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with MVBC-42HWFN10-MD3E-DD at the standard test temperatures, in BTU/h:

Certified matchups3 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.
MVBC-42HWFN10-MD3E-DD · cold climate	16.7	11.7	9.5	46,000	214861593
MVBC-48HWFN10-MD3E-DD · cold climate	16.7	11.7	9.5	46,000	215374763
MVBM-60C28T6N10 · cold climate	15.7	10.5	8.8	42,000	218806035

Same unit, other model numbers1

These model numbers have exactly the same certified ratings and matchups as the MDV MOX630-42HFN10-M3X-D: the same equipment under another brand, or a variant code for voltage, colour or market. Everything on this page applies to them.

ACIQ ACIQ-42-HPD

Yearly running cost in 10 large cities$1,184-$3,293

Phoenix, AZ$1,477/yr
Miami, FL$1,184/yr
Houston, TX$1,325/yr
Atlanta, GA$1,365/yr
Los Angeles, CA$1,334/yr
New York, NY$3,293/yr
Chicago, IL$2,679/yr
Denver, CO$2,232/yr
Seattle, WA$1,375/yr
Minneapolis, MN$2,765/yr

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

Questions6

What is the SEER2 rating of the MDV MOX630-42HFN10-M3X-D?: The MDV MOX630-42HFN10-M3X-D is rated at up to 16.7 SEER2 and 11.7 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 3 certified matchups SEER2 ranges from 15.7-16.7.
Is the MDV MOX630-42HFN10-M3X-D good for cold climates?: Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 46,000 BTU/h at 5°F with a COP of 1.90, so it is still 1.9 times as efficient as electric resistance heat at that temperature.
How much does the MDV MOX630-42HFN10-M3X-D cost to run per year?: At its rated efficiency it costs about $1,184-$3,293 a year in electricity in large U.S. cities, depending on climate and local rates - for example $1,477 in Phoenix and $2,765 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.
Is the MDV MOX630-42HFN10-M3X-D the same as the ACIQ ACIQ-42-HPD?: Yes, as far as the certified ratings go. ENERGY STAR lists both 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 MDV MOX630-42HFN10-M3X-D?: ENERGY STAR lists 3 certified combinations for this outdoor unit. The highest-rated ones use MVBC-42HWFN10-MD3E-DD, MVBC-48HWFN10-MD3E-DD, MVBM-60C28T6N10.
What refrigerant does the MDV MOX630-42HFN10-M3X-D 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 $1,475/yrYou save $822/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 MOX630-42HFN10-M3X-D

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: $1,475
Current system, per year: $2,297
You save per year: $822
Payback: 19.5 years
Net after 10 years: -$7,782

Cooling $885Heating $589Electricity used: 9,217 kWhSaved vs. a minimum-efficiency heat pump: $306

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 3.5 ton models

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DuraSTAR DRU1H42S2A · cold climate16.7 SEER2 · 9.5 HSPF2
DuraSTAR DRU1U48S2A · cold climate16.7 SEER2 · 9.0 HSPF2
AI AIR CONDITIONING AUO19-42N2-M3H-S · cold climate16.7 SEER2 · 9.5 HSPF2
Trane 5TWR5042A117.0 SEER2 · 8.5 HSPF2
Midea MO1BE-H48B-2A · cold climate16.7 SEER2 · 9.0 HSPF2
Samsung AC048FCUPCG · cold climate17.0 SEER2 · 8.5 HSPF2

See all 138 3.5 ton central heat pumps, ranked

Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of September 30, 2026. How we use the data.