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      12,000 BTU mini-split heat pump · HI EFFICIENCY

      AUFIT ASW-H12C5A3/*R3DI-C3

      Average cooling efficiency and below average heating efficiency for a 12,000 BTU mini-split heat pump, but not rated for cold climates.

      Ranks #310 of 394 12,000 BTU mini-splits for cooling efficiency, and costs about $333 a year to run in a mixed climate like Atlanta.

      SEER2
      22.0 Cooling efficiency over a season
      Average · beats 48%
      HSPF2
      9.0 Heating efficiency over a season
      Below average · beats 10%
      EER2
      10.0 Cooling efficiency on a 95°F day
      Below average · beats 5%
      Heat at 5°F
      8,200 BTU/h67% of its 47°F output
      Average · beats 60%

      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.
      • You mainly need heat - its HSPF2 is below average for mini-splits.

      Calculate my running cost

      Details

      Specifications12,000 BTU, R-32
      General
      BrandAUFIT
      Also sold asAUX
      Outdoor unit modelASW-H12C5A3/*R3DI-C3
      SeriesHI EFFICIENCY
      TypeMini-split heat pump
      Nominal size12,000 BTU
      CompressorVariable-speed units run longer at low powerContinuously variable
      RefrigerantR-32
      Connected (smart) capableNo
      On the market sinceApril 3, 2026
      Last certifiedJune 25, 2026
      Cooling
      SEER2Seasonal efficiency, higher is better22.0 (range 22.0)
      EER2Efficiency at 95°F outdoors10.0
      Cooling capacity12,000 BTU/h
      Heating
      HSPF2Seasonal efficiency, higher is better9.0
      Capacity at 47°F12,300 BTU/h
      Capacity at 17°F7,500 BTU/h
      Capacity at 5°F8,200 BTU/h
      COP at 5°F2.0 = twice as efficient as a space heater2.05
      ENERGY STAR cold climateNo
      Heating output as it gets colder67% kept at 5°F

      Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with ASW-H12C5A3/*R3DI-C3 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.
      ASW-H12C5A3/*R3DI-C322.010.09.08,200217626267
      ASW-H12C5A3/*R3DI-C3 AUX22.010.09.08,200214717090
      Yearly running cost in 10 large cities$258-$829

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

      Questions5
      What is the SEER2 rating of the AUFIT ASW-H12C5A3/*R3DI-C3?
      The AUFIT ASW-H12C5A3/*R3DI-C3 is rated at up to 22.0 SEER2 and 10.0 EER2 for cooling and up to 9.0 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with.
      Is the AUFIT ASW-H12C5A3/*R3DI-C3 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 12,000 BTU model.
      How much does the AUFIT ASW-H12C5A3/*R3DI-C3 cost to run per year?
      At its rated efficiency it costs about $258-$829 a year in electricity in large U.S. cities, depending on climate and local rates - for example $338 in Phoenix and $707 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 AUFIT ASW-H12C5A3/*R3DI-C3?
      ENERGY STAR lists 2 certified combinations for this outdoor unit. The highest-rated ones use ASW-H12C5A3/*R3DI-C3, AUX ASW-H12C5A3/*R3DI-C3.
      What refrigerant does the AUFIT ASW-H12C5A3/*R3DI-C3 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 $345/yrYou save $279/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 AUFIT ASW-H12C5A3/*R3DI-C3
      3. What it replaces
      4. Price replace the example with your quote
      Heat pump, per year
      $345
      Current system, per year
      $624
      You save per year
      $279
      Payback
      16.2 years
      Net after 10 years
      -$1,714

      Cooling $192Heating $153Electricity used: 2,157 kWhSaved vs. a minimum-efficiency heat pump: $134

      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 June 25, 2026. How we use the data.