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      18,000 BTU mini-split heat pump · MCBU series

      MDV MOX430-18HFN1-MU0W

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

      Ranks #79 of 465 18,000 BTU mini-splits for cooling efficiency, and costs about $439 a year to run in a mixed climate like Atlanta.

      SEER2
      24.0 Cooling efficiency over a season
      Very good · beats 75%
      HSPF2
      10.8 Heating efficiency over a season
      Very good · beats 71%
      EER2
      13.5 Cooling efficiency on a 95°F day
      Very good · beats 74%
      Heat at 5°F
      13,100 BTU/h71% of its 47°F output
      Excellent · beats 96%

      A good fit if…

      • You want low cooling bills - its SEER2 beats 75% of mini-splits.
      • Your winters get properly cold - it is ENERGY STAR cold-climate certified, with 13,100 BTU/h at 5°F.
      • It will heat most of the year - its HSPF2 beats 71% 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

      Specifications18,000 BTU, R-410A
      General
      BrandMDV
      Also sold asMidea, Alsetria, ECO-AIR, Cooper&Hunter, C&H
      Outdoor unit modelMOX430-18HFN1-MU0W
      SeriesMCBU series
      TypeMini-split heat pump
      Nominal size18,000 BTU
      CompressorVariable-speed units run longer at low powerContinuously variable
      RefrigerantR-410A
      Connected (smart) capableNo
      On the market sinceNovember 15, 2021
      Last certifiedApril 27, 2026
      Cooling
      SEER2Seasonal efficiency, higher is better24.0 (range 17.8-24.0)
      EER2Efficiency at 95°F outdoors11.7-13.5
      Cooling capacity16,000-18,000 BTU/h
      Heating
      HSPF2Seasonal efficiency, higher is better9.3-10.8
      Capacity at 47°F17,000-20,000 BTU/h
      Capacity at 17°F12,000-14,900 BTU/h
      Capacity at 5°F11,300-13,100 BTU/h
      COP at 5°F2.0 = twice as efficient as a space heater2.02-2.44
      ENERGY STAR cold climateYes
      Heating output as it gets colder71% kept at 5°F

      Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with MSAG11D-18HRFN1-MT8W at the standard test temperatures, in BTU/h:

      Certified matchups22 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.
      MSAG11D-18HRFN1-MT8W · cold climate24.013.510.512,800207613861
      MSAG11D-18HRFN1-MT8W MIDEA · cold climate24.013.510.512,800207821933
      MSABE-18HRFN1-MW5W · cold climate23.713.510.312,600207591137
      MSEPC-18HRFN1-MU0W23.512.510.811,300207613862
      MSEPC-18HRFN1-MU0W MIDEA23.512.510.811,300208568350
      MUEU-18HRFN1-M(C)23.012.510.013,000207614046
      MUEU-18HRFN1-M(C) MIDEA23.012.510.013,000208568359
      MFA2U-16HRFN1-MV0W · cold climate22.412.510.412,700209248927
      MFA2U-16HRFN1-MV0W ECO-AIR · cold climate22.412.510.412,700211644091
      MFA2U-16HRFN1-MV0W Alsetria · cold climate22.412.510.412,700211644097
      MCBU-18HRFN1-MU2W21.812.510.713,100209270208
      MCA3U-18HRFN1-M(C)20.512.510.512,700207614047
      CCA3U-18HRFN1-M(C) Alsetria20.512.510.512,700211644033
      CCA3U-18HRFN1-M(C) ECO-AIR20.512.510.512,700211644058
      CCA3U-18HRFN1-M(C) MIDEA20.512.510.512,700208568357
      MTIU-18HWFN1-M20.012.510.613,000207614048
      MTIU-18HWFN1-M Alsetria20.012.510.613,000211644026
      MTIU-18HWFN1-M ECO-AIR20.012.510.613,000211644051
      MTIU-18HWFN1-M MIDEA20.012.510.613,000207826702
      MVC-18HWFN1-MW(GA)17.811.79.312,800207742577
      MVC-18HWFN1-MW(GA)17.811.79.312,800211644102
      MVC-18HWFN1-MW(GA)17.811.79.312,800211644108
      Same unit, other model numbers1

      These model numbers have exactly the same certified ratings and matchups as the MDV MOX430-18HFN1-MU0W: the same equipment under another brand, or a variant code for voltage, colour or market. Everything on this page applies to them.

      Yearly running cost in 10 large cities$355-$1,079

      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 MOX430-18HFN1-MU0W?
      The MDV MOX430-18HFN1-MU0W is rated at up to 24.0 SEER2 and 13.5 EER2 for cooling and up to 10.8 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 22 certified matchups SEER2 ranges from 17.8-24.0.
      Is the MDV MOX430-18HFN1-MU0W good for cold climates?
      Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 13,100 BTU/h at 5°F with a COP of 2.44, so it is still 2.4 times as efficient as electric resistance heat at that temperature.
      How much does the MDV MOX430-18HFN1-MU0W cost to run per year?
      At its rated efficiency it costs about $355-$1,079 a year in electricity in large U.S. cities, depending on climate and local rates - for example $455 in Phoenix and $915 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.
      Is the MDV MOX430-18HFN1-MU0W the same as the Cooper&Hunter CH-ES18-230VO?
      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 MOX430-18HFN1-MU0W?
      ENERGY STAR lists 22 certified combinations for this outdoor unit. The highest-rated ones use MSAG11D-18HRFN1-MT8W, MIDEA MSAG11D-18HRFN1-MT8W, MSABE-18HRFN1-MW5W.
      What refrigerant does the MDV MOX430-18HFN1-MU0W 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 $461/yrYou save $483/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 MOX430-18HFN1-MU0W
      3. What it replaces
      4. Price replace the example with your quote
      Heat pump, per year
      $461
      Current system, per year
      $944
      You save per year
      $483
      Payback
      14.5 years
      Net after 10 years
      -$2,165

      Cooling $264Heating $197Electricity used: 2,881 kWhSaved vs. a minimum-efficiency heat pump: $266

      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 April 27, 2026. How we use the data.