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      24,000 BTU mini-split heat pump · H series

      COSTWAY FP10790US-12BK

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

      Ranks #280 of 430 24,000 BTU mini-splits for cooling efficiency, and costs about $622 a year to run in a mixed climate like Atlanta.

      SEER2
      21.0 Cooling efficiency over a season
      Below average · beats 30%
      HSPF2
      10.0 Heating efficiency over a season
      Average · beats 43%
      EER2
      12.0 Cooling efficiency on a 95°F day
      Below average · beats 25%
      Heat at 5°F
      15,300 BTU/h64% of its 47°F output
      Average · beats 48%

      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.

      Calculate my running cost

      Details

      Specifications24,000 BTU, R-32
      General
      BrandCOSTWAY
      Also sold asPremium Levella, ALBOTT, AUX
      Outdoor unit modelFP10790US-12BK
      SeriesH series
      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 sinceMarch 1, 2024
      Last certifiedMarch 13, 2025
      Cooling
      SEER2Seasonal efficiency, higher is better21.0 (range 21.0)
      EER2Efficiency at 95°F outdoors12.0
      Cooling capacity24,000 BTU/h
      Heating
      HSPF2Seasonal efficiency, higher is better10.0
      Capacity at 47°F24,000 BTU/h
      Capacity at 17°F20,000 BTU/h
      Capacity at 5°F15,300 BTU/h
      COP at 5°F2.0 = twice as efficient as a space heater2.00
      ENERGY STAR cold climateNo
      Heating output as it gets colder64% kept at 5°F

      Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with FP10790US-22BK 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.
      FP10790US-22BK21.012.010.015,300214826427
      Same unit, other model numbers6

      These model numbers have exactly the same certified ratings and matchups as the COSTWAY FP10790US-12BK: 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$538-$1,501

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

      Questions6
      What is the SEER2 rating of the COSTWAY FP10790US-12BK?
      The COSTWAY FP10790US-12BK is rated at up to 21.0 SEER2 and 12.0 EER2 for cooling and up to 10.0 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with.
      Is the COSTWAY FP10790US-12BK 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 COSTWAY FP10790US-12BK cost to run per year?
      At its rated efficiency it costs about $538-$1,501 a year in electricity in large U.S. cities, depending on climate and local rates - for example $672 in Phoenix and $1,260 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.
      Is the COSTWAY FP10790US-12BK the same as the COSTWAY FP10790US-12WH?
      Yes, as far as the certified ratings go. ENERGY STAR lists 7 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 COSTWAY FP10790US-12BK?
      ENERGY STAR lists 1 certified combination for this outdoor unit. The highest-rated one uses FP10790US-22BK.
      What refrigerant does the COSTWAY FP10790US-12BK 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 $671/yrYou save $566/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 COSTWAY FP10790US-12BK
      3. What it replaces
      4. Price replace the example with your quote
      Heat pump, per year
      $671
      Current system, per year
      $1,238
      You save per year
      $566
      Payback
      15.9 years
      Net after 10 years
      -$3,336

      Cooling $402Heating $269Electricity used: 4,194 kWhSaved vs. a minimum-efficiency heat pump: $278

      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 430 24,000 BTU mini-splits, ranked

      Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of March 13, 2025. How we use the data.