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      12,000 BTU mini-split heat pump · YN Series

      Pioneer YN012GMSI24RPG

      Very good cooling and heating efficiency for a 12,000 BTU mini-split heat pump, and certified for cold climates.

      Ranks #137 of 394 12,000 BTU mini-splits for cooling efficiency, and costs about $276 a year to run in a mixed climate like Atlanta.

      SEER2
      24.6 Cooling efficiency over a season
      Very good · beats 80%
      HSPF2
      11.0 Heating efficiency over a season
      Very good · beats 75%
      EER2
      12.7 Cooling efficiency on a 95°F day
      Average · beats 54%
      Heat at 5°F
      8,900 BTU/h74% of its 47°F output
      Excellent · beats 97%

      A good fit if…

      • You want low cooling bills - its SEER2 beats 80% of mini-splits.
      • Your winters get properly cold - it is ENERGY STAR cold-climate certified, with 8,900 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

      Specifications12,000 BTU, R-454B
      General
      BrandPioneer
      Outdoor unit modelYN012GMSI24RPG
      SeriesYN Series
      TypeMini-split heat pump
      Nominal size12,000 BTU
      CompressorVariable-speed units run longer at low powerContinuously variable
      RefrigerantR-454B
      Connected (smart) capableNo
      On the market sinceDecember 1, 2025
      Last certifiedJanuary 14, 2026
      Cooling
      SEER2Seasonal efficiency, higher is better24.6 (range 22.1-24.6)
      EER2Efficiency at 95°F outdoors12.3-12.7
      Cooling capacity12,000 BTU/h
      Heating
      HSPF2Seasonal efficiency, higher is better10.0-11.0
      Capacity at 47°F12,000 BTU/h
      Capacity at 17°F8,600-9,000 BTU/h
      Capacity at 5°F8,600-8,900 BTU/h
      COP at 5°F2.0 = twice as efficient as a space heater2.48-2.50
      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 FB012GMSILDFHG at the standard test temperatures, in BTU/h:

      Certified matchups2 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.
      FB012GMSILDFHG PIONEER · cold climate24.612.711.08,900218010989
      CK012GMSILDFHG PIONEER · cold climate22.112.310.08,600218010987
      Yearly running cost in 10 large cities$230-$674

      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 YN012GMSI24RPG?
      The Pioneer YN012GMSI24RPG is rated at up to 24.6 SEER2 and 12.7 EER2 for cooling and up to 11.0 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 2 certified matchups SEER2 ranges from 22.1-24.6.
      Is the Pioneer YN012GMSI24RPG good for cold climates?
      Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 8,900 BTU/h at 5°F with a COP of 2.50, so it is still 2.5 times as efficient as electric resistance heat at that temperature.
      How much does the Pioneer YN012GMSI24RPG cost to run per year?
      At its rated efficiency it costs about $230-$674 a year in electricity in large U.S. cities, depending on climate and local rates - for example $292 in Phoenix and $570 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 YN012GMSI24RPG?
      ENERGY STAR lists 2 certified combinations for this outdoor unit. The highest-rated ones use PIONEER FB012GMSILDFHG, PIONEER CK012GMSILDFHG.
      What refrigerant does the Pioneer YN012GMSI24RPG 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 $294/yrYou save $325/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 YN012GMSI24RPG
      3. What it replaces
      4. Price replace the example with your quote
      Heat pump, per year
      $294
      Current system, per year
      $619
      You save per year
      $325
      Payback
      13.9 years
      Net after 10 years
      -$1,251

      Cooling $172Heating $122Electricity used: 1,837 kWhSaved vs. a minimum-efficiency heat pump: $181

      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 14, 2026. How we use the data.