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      6,000 BTU mini-split heat pump · M-Series

      American Standard / Mitsubishi Electric NAXSPH06B112A

      Excellent cooling efficiency and very good heating efficiency for a 6,000 BTU mini-split heat pump, and certified for cold climates.

      Ranks #7 of 42 6,000 BTU mini-splits for cooling efficiency, and costs about $158 a year to run in a mixed climate like Atlanta.

      SEER2
      32.2 Cooling efficiency over a season
      Excellent · beats 99%
      HSPF2
      11.9 Heating efficiency over a season
      Very good · beats 88%
      EER2
      19.1 Cooling efficiency on a 95°F day
      Excellent · beats 100%
      Heat at 5°F
      10,500 BTU/h121% of its 47°F output
      Excellent · beats 96%

      A good fit if…

      • You want low cooling bills - its SEER2 beats 99% of mini-splits.
      • Your winters get properly cold - it is ENERGY STAR cold-climate certified, with 10,500 BTU/h at 5°F.
      • It will heat most of the year - its HSPF2 beats 88% of mini-splits.
      • You want steady temperatures and quiet running - the compressor varies its speed.

      Think twice if…

      • You want the newest refrigerant - it uses R-410A, which is being phased down.

      Calculate my running cost

      Details

      Specifications6,000 BTU, R-410A
      General
      BrandAmerican Standard / Mitsubishi Electric
      Outdoor unit modelNAXSPH06B112A
      SeriesM-Series
      TypeMini-split heat pump
      Nominal size6,000 BTU
      CompressorVariable-speed units run longer at low powerContinuously variable
      RefrigerantR-410A
      Connected (smart) capableNo
      On the market sinceDecember 1, 2022
      Last certifiedMarch 13, 2025
      Cooling
      SEER2Seasonal efficiency, higher is better32.2 (range 32.2)
      EER2Efficiency at 95°F outdoors19.1
      Cooling capacity6,000 BTU/h
      Heating
      HSPF2Seasonal efficiency, higher is better11.9
      Capacity at 47°F8,700 BTU/h
      Capacity at 17°F5,900 BTU/h
      Capacity at 5°F10,500 BTU/h
      COP at 5°F2.0 = twice as efficient as a space heater2.46
      ENERGY STAR cold climateYes
      Heating output as it gets colder121% kept at 5°F

      Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with NAXWPH06B112AA 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.
      NAXWPH06B112AA · cold climate32.219.111.910,500206195819
      Yearly running cost in 10 large cities$90-$418

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

      Questions5
      What is the SEER2 rating of the American Standard / Mitsubishi Electric NAXSPH06B112A?
      The American Standard / Mitsubishi Electric NAXSPH06B112A is rated at up to 32.2 SEER2 and 19.1 EER2 for cooling and up to 11.9 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with.
      Is the American Standard / Mitsubishi Electric NAXSPH06B112A good for cold climates?
      Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 10,500 BTU/h at 5°F with a COP of 2.46, so it is still 2.5 times as efficient as electric resistance heat at that temperature.
      How much does the American Standard / Mitsubishi Electric NAXSPH06B112A cost to run per year?
      At its rated efficiency it costs about $90-$418 a year in electricity in large U.S. cities, depending on climate and local rates - for example $136 in Phoenix and $368 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 American Standard / Mitsubishi Electric NAXSPH06B112A?
      ENERGY STAR lists 1 certified combination for this outdoor unit. The highest-rated one uses NAXWPH06B112AA.
      What refrigerant does the American Standard / Mitsubishi Electric NAXSPH06B112A use?
      It uses R-410A. R-410A is being phased down under the EPA AIM Act, and new systems are moving to R-454B and 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 $147/yrYou save $206/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 American Standard / Mitsubishi Electric NAXSPH06B112A
      3. What it replaces
      4. Price replace the example with your quote
      Heat pump, per year
      $147
      Current system, per year
      $354
      You save per year
      $206
      Payback
      12.1 years
      Net after 10 years
      -$439

      Cooling $66Heating $82Electricity used: 922 kWhSaved vs. a minimum-efficiency heat pump: $130

      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 March 13, 2025. How we use the data.