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Ranked by heat output at 5°f only

How much heat the unit can deliver when it is 5°F outside, in Btu per hour. Useful for comparing units. Whether it is enough for a particular house takes a load calculation. This list ranks by that one rating. For the units that hold up best in the cold overall, see the cold-climate picks.

Covers heat pumps sold new today (R-454B and R-32 refrigerant). See older R-410A models · Updated

Showing Ductless, Up to 1.5 tons (under 21,000 Btu/h cooling). What size is my system?

Top 10 by heat output at 5°f only: ductless, up to 1.5 tons

Ranked by this one rating, not an overall verdict. Every model here is the same size and type, so the numbers compare directly. Higher is better. One certified pairing per model.
  1. 1MUZ-FX24NLHZ***with ductless indoor unit MSZ-FX24NLMitsubishi ElectricAlso listed as MUZ-FX24NLHZ21.5 tons · 20,800 Btu/h · DuctlessTop 10%26,600 Btu/h
  2. 2AOUH18KZAH1with ductless indoor unit ASUH18KZASFujitsu1.5 tons · 18,000 Btu/h · DuctlessTop 10%25,400 Btu/h
  3. 3AOUH18KUAH1with ductless indoor unit ABUH18KUASFujitsu1.5 tons · 18,000 Btu/h · DuctlessTop 10%24,000 Btu/h
  4. 4MUZ-FX18NLHZ***with ductless indoor unit MSZ-FX18NLMitsubishi ElectricAlso listed as MUZ-FX18NLHZ21.5 tons · 17,200 Btu/h · DuctlessTop 10%23,600 Btu/h
  5. 5AOUH15KTAP1with ductless indoor unit ASUH15KTASFujitsu1 ton · 14,500 Btu/h · DuctlessTop 10%23,500 Btu/h
  6. 6YRACXJ18WHAAwith ductless indoor unit YRAKXJ18PHAAYorkAlso listed as YRACXJ18WHBA1.5 tons · 18,000 Btu/h · DuctlessTop 10%23,000 Btu/h
  7. 737MPRAQ18AA3with ductless indoor unit 45MPHAQ18XA3CarrierAlso sold as Midea 37MPRAQ18AA3, MDV MOD30-18HFN10-M1H1.5 tons · 18,000 Btu/h · DuctlessTop 10%22,600 Btu/h
  8. 8D5CPRAH18AAwith ductless indoor unit D5FPHAH18XAKMideaAlso sold as Arcoaire D5CPRAH18AA1.5 tons · 18,000 Btu/h · DuctlessTop 10%22,600 Btu/h
  9. 9MO1SS-H18B-2Awith ductless indoor unit MSESU-H18B-2AMidea1.5 tons · 18,000 Btu/h · DuctlessTop 10%22,600 Btu/h
  10. 10BMS1826SHYCwith ductless indoor unit BMS1826SHYWBlueRidgeAlso listed as BXS6A18UC01.5 tons · 18,000 Btu/h · DuctlessTop 10%22,600 Btu/h

Every ductless, up to 1.5 tons model, highest first

Top cold-climate picks, ductless up to 1.5 tons

These are certified test ratings, not a recommendation for your home. The right size comes from a load calculation by a contractor.

Want this size class’s full distribution and peer percentiles? Switch to Advanced

What good looks like: ductless, up to 1.5 tons

Good is better than half of this size class, great is the top quarter, top is the top 10%. The scale comes from the class’s own ratings.

  • COP at 5°F

    Efficiency on a 5°F day

    How much heat the unit makes from each unit of electricity when it is 5°F outside.

    Good
    1.95+
    Great
    2.10+
    Top 10%
    2.25+

  • HSPF2

    Winter-long heating efficiency

    Heating efficiency over a whole winter, measured with a federal test.

    Good
    9.5+
    Great
    10.2+
    Top 10%
    11.4+

  • SEER2

    Summer-long cooling efficiency

    Cooling efficiency over a whole summer, measured with a federal test.

    Good
    21.4+
    Great
    23.5+
    Top 10%
    25.0+

Next steps

The advanced view adds the all-sizes boards, each qualifier’s peer percentiles, charts of every model in each size class, and the EER2 and heat output boards.

Open the advanced view