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      24,000 BTU mini-split heat pump · Zeno

      GREE GWH24AYEXF-D6DNA1K/O

      Below average cooling and heating efficiency for a 24,000 BTU mini-split heat pump, but not rated for cold climates.

      Ranks #303 of 430 24,000 BTU mini-splits for cooling efficiency, and costs about $721 a year to run in a mixed climate like Atlanta.

      SEER2
      21.0 Cooling efficiency over a season
      Below average · beats 30%
      HSPF2
      8.0 Heating efficiency over a season
      Below average · beats 0%
      EER2
      11.0 Cooling efficiency on a 95°F day
      Below average · beats 9%
      Heat at 5°F
      - Not reported by the maker

      A good fit if…

      • You want steady temperatures and quiet running - the compressor varies its speed.

      Think twice if…

      • You often see nights below 0°F - it is not cold-climate certified.
      • Cooling cost matters most - its SEER2 is below average for mini-splits.
      • You mainly need heat - its HSPF2 is below average for mini-splits.

      Calculate my running cost

      Details

      Specifications24,000 BTU, R-32
      General
      BrandGREE
      Outdoor unit modelGWH24AYEXF-D6DNA1K/O
      SeriesZeno
      TypeMini-split heat pump
      Nominal size24,000 BTU
      CompressorVariable-speed units run longer at low powerContinuously variable
      RefrigerantR-32
      Connected (smart) capableNo
      On the market sinceOctober 16, 2025
      Last certifiedNovember 20, 2025
      Cooling
      SEER2Seasonal efficiency, higher is better21.0 (range 21.0)
      EER2Efficiency at 95°F outdoors11.0
      Cooling capacity24,000 BTU/h
      Heating
      HSPF2Seasonal efficiency, higher is better8.0
      Capacity at 47°F24,000 BTU/h
      Capacity at 17°F14,000 BTU/h
      Capacity at 5°F-
      COP at 5°F2.0 = twice as efficient as a space heater-
      ENERGY STAR cold climateNo
      Heating output as it gets colder

      Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with GWH24AYEXF-D6DN***/I 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.
      GWH24AYEXF-D6DN***/I21.011.08.0-217897477
      GWH24AWEXF-D6DN***/I21.011.08.0-218000503
      GWH24AZEXF-D6DN***/I21.011.08.0-218000502
      Yearly running cost in 10 large cities$543-$1,807

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

      Questions5
      What is the SEER2 rating of the GREE GWH24AYEXF-D6DNA1K/O?
      The GREE GWH24AYEXF-D6DNA1K/O is rated at up to 21.0 SEER2 and 11.0 EER2 for cooling and up to 8.0 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with.
      Is the GREE GWH24AYEXF-D6DNA1K/O good for cold climates?
      It is not cold-climate certified: none of its matchups meet the ENERGY STAR cold-climate criteria (a COP of at least 1.75 at 5°F among other limits). In places with frequent sub-zero nights, pick a cold-climate 24,000 BTU model.
      How much does the GREE GWH24AYEXF-D6DNA1K/O cost to run per year?
      At its rated efficiency it costs about $543-$1,807 a year in electricity in large U.S. cities, depending on climate and local rates - for example $718 in Phoenix and $1,548 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 GREE GWH24AYEXF-D6DNA1K/O?
      ENERGY STAR lists 3 certified combinations for this outdoor unit. The highest-rated ones use GWH24AYEXF-D6DN***/I, GWH24AWEXF-D6DN***/I, GWH24AZEXF-D6DN***/I.
      What refrigerant does the GREE GWH24AYEXF-D6DNA1K/O 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 $738/yrYou save $499/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 GREE GWH24AYEXF-D6DNA1K/O
      3. What it replaces
      4. Price replace the example with your quote
      Heat pump, per year
      $738
      Current system, per year
      $1,238
      You save per year
      $499
      Payback
      18.0 years
      Net after 10 years
      -$4,008

      Cooling $402Heating $336Electricity used: 4,614 kWhSaved vs. a minimum-efficiency heat pump: $211

      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 November 20, 2025. How we use the data.