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

      Goodman MSH183G32MCAA

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

      Ranks #202 of 465 18,000 BTU mini-splits for cooling efficiency, and costs about $432 a year to run in a mixed climate like Atlanta.

      SEER2
      22.0 Cooling efficiency over a season
      Average · beats 48%
      HSPF2
      11.0 Heating efficiency over a season
      Very good · beats 75%
      EER2
      12.9 Cooling efficiency on a 95°F day
      Average · beats 57%
      Heat at 5°F
      19,000 BTU/h106% of its 47°F output
      Below average · beats 34%

      A good fit if…

      • Your winters get properly cold - it is ENERGY STAR cold-climate certified, with 19,000 BTU/h at 5°F.
      • It will heat most of the year - its HSPF2 beats 75% 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-32
      General
      BrandGoodman
      Also sold asMDV, Franklin
      Outdoor unit modelMSH183G32MCAA
      SeriesMSH Series
      TypeMini-split heat pump
      Nominal size18,000 BTU
      CompressorVariable-speed units run longer at low powerContinuously variable
      RefrigerantR-32
      Connected (smart) capableNo
      On the market sinceFebruary 9, 2026
      Last certifiedApril 21, 2026
      Cooling
      SEER2Seasonal efficiency, higher is better22.0 (range 22.0)
      EER2Efficiency at 95°F outdoors12.9
      Cooling capacity18,000 BTU/h
      Heating
      HSPF2Seasonal efficiency, higher is better11.0
      Capacity at 47°F18,000 BTU/h
      Capacity at 17°F16,500 BTU/h
      Capacity at 5°F19,000 BTU/h
      COP at 5°F2.0 = twice as efficient as a space heater1.95
      ENERGY STAR cold climateYes
      Heating output as it gets colder106% kept at 5°F

      Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with MSH183G32AXAA at the standard test temperatures, in BTU/h:

      Certified matchups1 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.
      MSH183G32AXAA GOODMAN · cold climate22.012.911.019,000218083246
      Same unit, other model numbers2

      These model numbers have exactly the same certified ratings and matchups as the Goodman MSH183G32MCAA: 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$385-$1,033

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

      Questions6
      What is the SEER2 rating of the Goodman MSH183G32MCAA?
      The Goodman MSH183G32MCAA is rated at up to 22.0 SEER2 and 12.9 EER2 for cooling and up to 11.0 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with.
      Is the Goodman MSH183G32MCAA good for cold climates?
      Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 19,000 BTU/h at 5°F with a COP of 1.95, so it is still 2.0 times as efficient as electric resistance heat at that temperature.
      How much does the Goodman MSH183G32MCAA cost to run per year?
      At its rated efficiency it costs about $385-$1,033 a year in electricity in large U.S. cities, depending on climate and local rates - for example $475 in Phoenix and $863 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.
      Is the Goodman MSH183G32MCAA the same as the MDV MOX430-18HFN8-M1X?
      Yes, as far as the certified ratings go. ENERGY STAR lists 3 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 Goodman MSH183G32MCAA?
      ENERGY STAR lists 1 certified combination for this outdoor unit. The highest-rated one uses GOODMAN MSH183G32AXAA.
      What refrigerant does the Goodman MSH183G32MCAA 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 $471/yrYou save $457/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 Goodman MSH183G32MCAA
      3. What it replaces
      4. Price replace the example with your quote
      Heat pump, per year
      $471
      Current system, per year
      $928
      You save per year
      $457
      Payback
      15.3 years
      Net after 10 years
      -$2,431

      Cooling $288Heating $183Electricity used: 2,945 kWhSaved vs. a minimum-efficiency heat pump: $241

      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 April 21, 2026. How we use the data.