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      3-ton central heat pump · Ultra

      YISO YOHA8-36A

      Very good cooling efficiency and average heating efficiency for a 3-ton central heat pump, and certified for cold climates.

      Ranks #56 of 302 3 ton central heat pumps for cooling efficiency, and costs about $991 a year to run in a mixed climate like Atlanta.

      SEER2
      19.0 Cooling efficiency over a season
      Very good · beats 85%
      HSPF2
      9.0 Heating efficiency over a season
      Average · beats 54%
      EER2
      10.8 Cooling efficiency on a 95°F day
      Below average · beats 19%
      Heat at 5°F
      25,200 BTU/h70% of its 47°F output
      Below average · beats 27%

      A good fit if…

      • You want low cooling bills - its SEER2 beats 85% of central heat pumps.
      • Your winters get properly cold - it is ENERGY STAR cold-climate certified, with 25,200 BTU/h at 5°F.
      • 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

      Specifications3 ton, R-410A
      General
      BrandYISO
      Outdoor unit modelYOHA8-36A
      SeriesUltra
      TypeCentral heat pump
      Nominal size3 ton
      CompressorVariable-speed units run longer at low powerContinuously variable
      RefrigerantR-410A
      Connected (smart) capableNo
      On the market sinceAugust 20, 2024
      Last certifiedAugust 5, 2026
      Cooling
      SEER2Seasonal efficiency, higher is better19.0 (range 17.2-19.0)
      EER2Efficiency at 95°F outdoors10.8-11.7
      Cooling capacity23,000-34,200 BTU/h
      Heating
      HSPF2Seasonal efficiency, higher is better8.8-9.0
      Capacity at 47°F23,000-36,000 BTU/h
      Capacity at 17°F21,400-27,600 BTU/h
      Capacity at 5°F19,000-25,200 BTU/h
      COP at 5°F2.0 = twice as efficient as a space heater1.90-1.95
      ENERGY STAR cold climateYes
      Heating output as it gets colder70% kept at 5°F

      Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with YAHA2-36CB at the standard test temperatures, in BTU/h:

      Certified matchups3 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.
      YAHA2-36CB · cold climate19.010.89.025,200217269576
      YAHA2-24AA · cold climate18.511.78.819,000215722677
      YAHA2-36AA · cold climate17.210.89.024,600215722678
      Yearly running cost in 10 large cities$834-$2,411

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

      Questions5
      What is the SEER2 rating of the YISO YOHA8-36A?
      The YISO YOHA8-36A is rated at up to 19.0 SEER2 and 10.8 EER2 for cooling and up to 9.0 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 3 certified matchups SEER2 ranges from 17.2-19.0.
      Is the YISO YOHA8-36A good for cold climates?
      Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 25,200 BTU/h at 5°F with a COP of 1.95, so it is still 2.0 times as efficient as electric resistance heat at that temperature.
      How much does the YISO YOHA8-36A cost to run per year?
      At its rated efficiency it costs about $834-$2,411 a year in electricity in large U.S. cities, depending on climate and local rates - for example $1,053 in Phoenix and $2,034 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 YISO YOHA8-36A?
      ENERGY STAR lists 3 certified combinations for this outdoor unit. The highest-rated ones use YAHA2-36CB, YAHA2-24AA, YAHA2-36AA.
      What refrigerant does the YISO YOHA8-36A 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 $1,058/yrYou save $697/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 YISO YOHA8-36A
      3. What it replaces
      4. Price replace the example with your quote
      Heat pump, per year
      $1,058
      Current system, per year
      $1,755
      You save per year
      $697
      Payback
      17.9 years
      Net after 10 years
      -$5,526

      Cooling $622Heating $436Electricity used: 6,613 kWhSaved vs. a minimum-efficiency heat pump: $292

      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 August 5, 2026. How we use the data.