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      2-ton central heat pump · MVB Series

      MDV MOX330-24HFN8-M3

      Average cooling and heating efficiency for a 2-ton central heat pump, and certified for cold climates.

      Ranks #249 of 331 2 ton central heat pumps for cooling efficiency, and costs about $697 a year to run in a mixed climate like Atlanta.

      SEER2
      16.5 Cooling efficiency over a season
      Average · beats 40%
      HSPF2
      9.0 Heating efficiency over a season
      Average · beats 54%
      EER2
      8.2 Cooling efficiency on a 95°F day
      Below average · beats 1%
      Heat at 5°F
      18,200 BTU/h79% of its 47°F output
      Below average · beats 2%

      A good fit if…

      • Your winters get properly cold - it is ENERGY STAR cold-climate certified, with 18,200 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

      Specifications2 ton, R-32
      General
      BrandMDV
      Outdoor unit modelMOX330-24HFN8-M3
      SeriesMVB Series
      TypeCentral heat pump
      Nominal size2 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 better16.5 (range 16.4-16.5)
      EER2Efficiency at 95°F outdoors8.2
      Cooling capacity23,000 BTU/h
      Heating
      HSPF2Seasonal efficiency, higher is better9.0
      Capacity at 47°F23,000 BTU/h
      Capacity at 17°F17,600 BTU/h
      Capacity at 5°F18,200 BTU/h
      COP at 5°F2.0 = twice as efficient as a space heater1.78
      ENERGY STAR cold climateYes
      Heating output as it gets colder79% kept at 5°F

      Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with MVBC-24HWFN50-MB3F 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-24HWFN50-MB3F · cold climate16.58.29.018,200218743472
      MVBC-24HWFN50-MB3F-D · cold climate16.48.29.018,200218743492
      Yearly running cost in 10 large cities$653-$1,641

      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 MOX330-24HFN8-M3?
      The MDV MOX330-24HFN8-M3 is rated at up to 16.5 SEER2 and 8.2 EER2 for cooling and up to 9.0 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 2 certified matchups SEER2 ranges from 16.4-16.5.
      Is the MDV MOX330-24HFN8-M3 good for cold climates?
      Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 18,200 BTU/h at 5°F with a COP of 1.78, so it is still 1.8 times as efficient as electric resistance heat at that temperature.
      How much does the MDV MOX330-24HFN8-M3 cost to run per year?
      At its rated efficiency it costs about $653-$1,641 a year in electricity in large U.S. cities, depending on climate and local rates - for example $791 in Phoenix and $1,359 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 MOX330-24HFN8-M3?
      ENERGY STAR lists 2 certified combinations for this outdoor unit. The highest-rated ones use MVBC-24HWFN50-MB3F, MVBC-24HWFN50-MB3F-D.
      What refrigerant does the MDV MOX330-24HFN8-M3 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 $777/yrYou save $409/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 MOX330-24HFN8-M3
      3. What it replaces
      4. Price replace the example with your quote
      Heat pump, per year
      $777
      Current system, per year
      $1,186
      You save per year
      $409
      Payback
      20.8 years
      Net after 10 years
      -$4,410

      Cooling $491Heating $286Electricity used: 4,856 kWhSaved vs. a minimum-efficiency heat pump: $133

      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 2 ton models

      See all 331 2 ton central heat pumps, ranked

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