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      4-ton central heat pump · MVB Series

      MDV MOX630-48HFN8-M3F

      Average cooling and heating efficiency for a 4-ton central heat pump, and certified for cold climates.

      Ranks #114 of 319 4 ton central heat pumps for cooling efficiency, and costs about $1,443 a year to run in a mixed climate like Atlanta.

      SEER2
      17.8 Cooling efficiency over a season
      Average · beats 62%
      HSPF2
      8.7 Heating efficiency over a season
      Average · beats 47%
      EER2
      10.7 Cooling efficiency on a 95°F day
      Below average · beats 19%
      Heat at 5°F
      38,500 BTU/h80% of its 47°F output
      Below average · beats 25%

      A good fit if…

      • Your winters get properly cold - it is ENERGY STAR cold-climate certified, with 38,500 BTU/h at 5°F.
      • 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

      Specifications4 ton, R-32
      General
      BrandMDV
      Outdoor unit modelMOX630-48HFN8-M3F
      SeriesMVB Series
      TypeCentral heat pump
      Nominal size4 ton
      CompressorVariable-speed units run longer at low powerContinuously variable
      RefrigerantR-32
      Connected (smart) capableNo
      On the market sinceAugust 20, 2026
      Last certifiedSeptember 22, 2026
      Cooling
      SEER2Seasonal efficiency, higher is better17.8 (range 17.7-17.8)
      EER2Efficiency at 95°F outdoors10.7
      Cooling capacity48,000 BTU/h
      Heating
      HSPF2Seasonal efficiency, higher is better8.7
      Capacity at 47°F48,000 BTU/h
      Capacity at 17°F34,400 BTU/h
      Capacity at 5°F38,500 BTU/h
      COP at 5°F2.0 = twice as efficient as a space heater1.91
      ENERGY STAR cold climateYes
      Heating output as it gets colder80% kept at 5°F

      Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with MVBC-48HWFN50-MC3F at the standard test temperatures, in BTU/h:

      Certified matchups2 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 unitSEER2EER2HSPF2Heat @5°FAHRI ref.
      MVBC-48HWFN50-MC3F · cold climate17.810.78.738,500218743474
      MVBC-48HWFN50-MC3F-D · cold climate17.710.78.738,500218743494
      Yearly running cost in 10 large cities$1,268-$3,466

      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 MOX630-48HFN8-M3F?
      The MDV MOX630-48HFN8-M3F is rated at up to 17.8 SEER2 and 10.7 EER2 for cooling and up to 8.7 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 2 certified matchups SEER2 ranges from 17.7-17.8.
      Is the MDV MOX630-48HFN8-M3F good for cold climates?
      Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 38,500 BTU/h at 5°F with a COP of 1.91, so it is still 1.9 times as efficient as electric resistance heat at that temperature.
      How much does the MDV MOX630-48HFN8-M3F cost to run per year?
      At its rated efficiency it costs about $1,268-$3,466 a year in electricity in large U.S. cities, depending on climate and local rates - for example $1,574 in Phoenix and $2,904 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 MOX630-48HFN8-M3F?
      ENERGY STAR lists 2 certified combinations for this outdoor unit. The highest-rated ones use MVBC-48HWFN50-MC3F, MVBC-48HWFN50-MC3F-D.
      What refrigerant does the MDV MOX630-48HFN8-M3F use?
      It uses 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 $1,567/yrYou save $908/yrSee details ↓
      1. Where you live
      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.

      2. The heat pump MDV MOX630-48HFN8-M3F
      3. What it replaces
      4. Price replace the example with your quote
      Heat pump, per year
      $1,567
      Current system, per year
      $2,475
      You save per year
      $908
      Payback
      19.8 years
      Net after 10 years
      -$8,921

      Cooling $949Heating $618Electricity used: 9,795 kWhSaved vs. a minimum-efficiency heat pump: $331

      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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      Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of September 22, 2026. How we use the data.