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      24,000 BTU mini-split heat pump · Diamante Ultra

      Pioneer YN024GLSI24RPG

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

      Ranks #102 of 430 24,000 BTU mini-splits for cooling efficiency, and costs about $594 a year to run in a mixed climate like Atlanta.

      SEER2
      23.0 Cooling efficiency over a season
      Average · beats 62%
      HSPF2
      10.4 Heating efficiency over a season
      Average · beats 57%
      EER2
      11.7 Cooling efficiency on a 95°F day
      Below average · beats 16%
      Heat at 5°F
      19,100 BTU/h74% of its 47°F output
      Average · beats 48%

      A good fit if…

      • Your winters get properly cold - it is ENERGY STAR cold-climate certified, with 19,100 BTU/h at 5°F.
      • 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
      BrandPioneer
      Outdoor unit modelYN024GLSI24RPG
      SeriesDiamante Ultra
      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 sinceFebruary 3, 2025
      Last certifiedJanuary 7, 2026
      Cooling
      SEER2Seasonal efficiency, higher is better23.0 (range 19.0-23.0)
      EER2Efficiency at 95°F outdoors11.0-11.7
      Cooling capacity22,000-23,000 BTU/h
      Heating
      HSPF2Seasonal efficiency, higher is better9.5-10.4
      Capacity at 47°F24,400-25,000 BTU/h
      Capacity at 17°F21,000-22,000 BTU/h
      Capacity at 5°F18,500-19,100 BTU/h
      COP at 5°F2.0 = twice as efficient as a space heater1.80-2.00
      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 WT024GLSI24HLG at the standard test temperatures, in BTU/h:

      Certified matchups4 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.
      WT024GLSI24HLG · cold climate23.011.79.518,600217048753
      CT024GLSILCFHG · cold climate22.511.710.419,100217048761
      UT024GLSILCFHG · cold climate20.011.79.518,500217048767
      - · cold climate19.011.010.018,500217048765
      Yearly running cost in 10 large cities$473-$1,468

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

      Questions5
      What is the SEER2 rating of the Pioneer YN024GLSI24RPG?
      The Pioneer YN024GLSI24RPG is rated at up to 23.0 SEER2 and 11.7 EER2 for cooling and up to 10.4 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 4 certified matchups SEER2 ranges from 19.0-23.0.
      Is the Pioneer YN024GLSI24RPG good for cold climates?
      Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 19,100 BTU/h at 5°F with a COP of 2.00, so it is still 2.0 times as efficient as electric resistance heat at that temperature.
      How much does the Pioneer YN024GLSI24RPG cost to run per year?
      At its rated efficiency it costs about $473-$1,468 a year in electricity in large U.S. cities, depending on climate and local rates - for example $611 in Phoenix and $1,248 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 Pioneer YN024GLSI24RPG?
      ENERGY STAR lists 4 certified combinations for this outdoor unit. The highest-rated ones use WT024GLSI24HLG, CT024GLSILCFHG, UT024GLSILCFHG.
      What refrigerant does the Pioneer YN024GLSI24RPG 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 $621/yrYou save $597/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 Pioneer YN024GLSI24RPG
      3. What it replaces
      4. Price replace the example with your quote
      Heat pump, per year
      $621
      Current system, per year
      $1,219
      You save per year
      $597
      Payback
      14.2 years
      Net after 10 years
      -$2,526

      Cooling $352Heating $269Electricity used: 3,883 kWhSaved vs. a minimum-efficiency heat pump: $318

      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 January 7, 2026. How we use the data.