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      24,000 BTU mini-split heat pump · MRS Series

      TGM MRS5VHT24AS

      Average cooling efficiency and very good heating efficiency for a 24,000 BTU mini-split heat pump, and certified for cold climates.

      Ranks #182 of 430 24,000 BTU mini-splits for cooling efficiency, and costs about $587 a year to run in a mixed climate like Atlanta.

      SEER2
      22.0 Cooling efficiency over a season
      Average · beats 48%
      HSPF2
      11.1 Heating efficiency over a season
      Very good · beats 78%
      EER2
      12.0 Cooling efficiency on a 95°F day
      Below average · beats 25%
      Heat at 5°F
      19,000 BTU/h74% of its 47°F output
      Very good · beats 86%

      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 78% 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

      Specifications24,000 BTU, R-454B
      General
      BrandTGM
      Outdoor unit modelMRS5VHT24AS
      SeriesMRS Series
      TypeMini-split heat pump
      Nominal size24,000 BTU
      CompressorVariable-speed units run longer at low powerContinuously variable
      RefrigerantR-454B
      Connected (smart) capableNo
      On the market sinceDecember 30, 2024
      Last certifiedApril 22, 2025
      Cooling
      SEER2Seasonal efficiency, higher is better22.0 (range 19.0-22.0)
      EER2Efficiency at 95°F outdoors12.0-12.5
      Cooling capacity24,000 BTU/h
      Heating
      HSPF2Seasonal efficiency, higher is better10.5-11.1
      Capacity at 47°F24,400-25,000 BTU/h
      Capacity at 17°F20,000-21,200 BTU/h
      Capacity at 5°F18,500-19,000 BTU/h
      COP at 5°F2.0 = twice as efficient as a space heater2.27-2.30
      ENERGY STAR cold climateYes
      Heating output as it gets colder74% kept at 5°F

      Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with MC45VHT24S 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.
      MC45VHT24S · cold climate22.012.010.518,500217274614
      MUV5HT24S · cold climate21.112.211.118,600216706039
      MFC5VHT24S · cold climate19.012.511.019,000217274615
      Yearly running cost in 10 large cities$513-$1,413

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

      Questions5
      What is the SEER2 rating of the TGM MRS5VHT24AS?
      The TGM MRS5VHT24AS is rated at up to 22.0 SEER2 and 12.0 EER2 for cooling and up to 11.1 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 3 certified matchups SEER2 ranges from 19.0-22.0.
      Is the TGM MRS5VHT24AS 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 2.30, so it is still 2.3 times as efficient as electric resistance heat at that temperature.
      How much does the TGM MRS5VHT24AS cost to run per year?
      At its rated efficiency it costs about $513-$1,413 a year in electricity in large U.S. cities, depending on climate and local rates - for example $638 in Phoenix and $1,185 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 TGM MRS5VHT24AS?
      ENERGY STAR lists 3 certified combinations for this outdoor unit. The highest-rated ones use MC45VHT24S, MUV5HT24S, MFC5VHT24S.
      What refrigerant does the TGM MRS5VHT24AS 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 $636/yrYou save $618/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 TGM MRS5VHT24AS
      3. What it replaces
      4. Price replace the example with your quote
      Heat pump, per year
      $636
      Current system, per year
      $1,254
      You save per year
      $618
      Payback
      14.6 years
      Net after 10 years
      -$2,824

      Cooling $384Heating $252Electricity used: 3,977 kWhSaved vs. a minimum-efficiency heat pump: $328

      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 24,000 BTU models

      See all 430 24,000 BTU mini-splits, ranked

      Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of April 22, 2025. How we use the data.