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      18,000 BTU mini-split heat pump · MSEP Series

      MDV MOD30-18HFN10-M1H

      Excellent cooling and heating efficiency for a 18,000 BTU mini-split heat pump, and certified for cold climates.

      Ranks #16 of 465 18,000 BTU mini-splits for cooling efficiency, and costs about $355 a year to run in a mixed climate like Atlanta.

      SEER2
      25.8 Cooling efficiency over a season
      Excellent · beats 90%
      HSPF2
      15.2 Heating efficiency over a season
      Excellent · beats 100%
      EER2
      15.0 Cooling efficiency on a 95°F day
      Excellent · beats 91%
      Heat at 5°F
      22,600 BTU/h113% of its 47°F output
      Very good · beats 89%

      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 22,600 BTU/h at 5°F.
      • It will heat most of the year - its HSPF2 beats 100% 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

      Specifications18,000 BTU, R-454B
      General
      BrandMDV
      Outdoor unit modelMOD30-18HFN10-M1H
      SeriesMSEP Series
      TypeMini-split heat pump
      Nominal size18,000 BTU
      CompressorVariable-speed units run longer at low powerContinuously variable
      RefrigerantR-454B
      Connected (smart) capableNo
      On the market sinceFebruary 4, 2024
      Last certifiedMarch 4, 2025
      Cooling
      SEER2Seasonal efficiency, higher is better25.8 (range 24.5-25.8)
      EER2Efficiency at 95°F outdoors14.0-15.0
      Cooling capacity18,000 BTU/h
      Heating
      HSPF2Seasonal efficiency, higher is better15.2
      Capacity at 47°F20,000 BTU/h
      Capacity at 17°F19,300 BTU/h
      Capacity at 5°F22,600 BTU/h
      COP at 5°F2.0 = twice as efficient as a space heater2.34
      ENERGY STAR cold climateYes
      Heating output as it gets colder113% kept at 5°F

      Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with MSEPD-18HRFN10-M1H 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 unitSEER2EER2HSPF2Heat @5°FAHRI ref.
      MSEPD-18HRFN10-M1H · cold climate25.815.0-22,600214855399
      MSEPD-18HRFN10-M1H-D · cold climate25.615.0-22,600214855504
      MSEPD-18HRFN10-M1H-C · cold climate24.514.015.222,600214855500
      Yearly running cost in 10 large cities$327-$840

      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 MOD30-18HFN10-M1H?
      The MDV MOD30-18HFN10-M1H is rated at up to 25.8 SEER2 and 15.0 EER2 for cooling and up to 15.2 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 3 certified matchups SEER2 ranges from 24.5-25.8.
      Is the MDV MOD30-18HFN10-M1H good for cold climates?
      Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 22,600 BTU/h at 5°F with a COP of 2.34, so it is still 2.3 times as efficient as electric resistance heat at that temperature.
      How much does the MDV MOD30-18HFN10-M1H cost to run per year?
      At its rated efficiency it costs about $327-$840 a year in electricity in large U.S. cities, depending on climate and local rates - for example $399 in Phoenix and $698 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 MOD30-18HFN10-M1H?
      ENERGY STAR lists 3 certified combinations for this outdoor unit. The highest-rated ones use MSEPD-18HRFN10-M1H, MSEPD-18HRFN10-M1H-D, MSEPD-18HRFN10-M1H-C.
      What refrigerant does the MDV MOD30-18HFN10-M1H 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 $393/yrYou save $568/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 MOD30-18HFN10-M1H
      3. What it replaces
      4. Price replace the example with your quote
      Heat pump, per year
      $393
      Current system, per year
      $961
      You save per year
      $568
      Payback
      12.3 years
      Net after 10 years
      -$1,321

      Cooling $246Heating $147Electricity used: 2,456 kWhSaved vs. a minimum-efficiency heat pump: $349

      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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      See all 465 18,000 BTU mini-splits, ranked

      Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of March 4, 2025. How we use the data.