HVAC Rated
    Menu

      3-ton central heat pump · GT4

      Innovair GOV36H2BA

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

      Ranks #31 of 302 3 ton central heat pumps for cooling efficiency, and costs about $936 a year to run in a mixed climate like Atlanta.

      SEER2
      20.0 Cooling efficiency over a season
      Excellent · beats 94%
      HSPF2
      9.4 Heating efficiency over a season
      Average · beats 64%
      EER2
      13.3 Cooling efficiency on a 95°F day
      Excellent · beats 93%
      Heat at 5°F
      24,000 BTU/h83% of its 47°F output
      Average · beats 58%

      A good fit if…

      • You want low cooling bills - its SEER2 beats 94% of central heat pumps.
      • Your winters get properly cold - it is ENERGY STAR cold-climate certified, with 24,000 BTU/h at 5°F.
      • 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

      Specifications3 ton, R-454B
      General
      BrandInnovair
      Also sold asWells, Pioneer, Thermal Zone, GCHV
      Outdoor unit modelGOV36H2BA
      SeriesGT4
      TypeCentral heat pump
      Nominal size3 ton
      CompressorVariable-speed units run longer at low powerContinuously variable
      RefrigerantR-454B
      Connected (smart) capableNo
      On the market sinceFebruary 25, 2025
      Last certifiedNovember 24, 2025
      Cooling
      SEER2Seasonal efficiency, higher is better20.0 (range 18.6-20.0)
      EER2Efficiency at 95°F outdoors11.7-13.3
      Cooling capacity24,000-34,000 BTU/h
      Heating
      HSPF2Seasonal efficiency, higher is better9.0-9.4
      Capacity at 47°F24,000-34,200 BTU/h
      Capacity at 17°F19,200-24,000 BTU/h
      Capacity at 5°F20,000-24,000 BTU/h
      COP at 5°F2.0 = twice as efficient as a space heater2.10
      ENERGY STAR cold climateYes
      Heating output as it gets colder83% kept at 5°F

      Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with GAV24B2A 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.
      GAV24B2A · cold climate20.013.39.420,000215318726
      GAV36B2A · cold climate18.611.79.024,000215318727
      Same unit, other model numbers4

      These model numbers have exactly the same certified ratings and matchups as the Innovair GOV36H2BA: the same equipment under another brand, or a variant code for voltage, colour or market. Everything on this page applies to them.

      Yearly running cost in 10 large cities$801-$2,267

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

      Questions6
      What is the SEER2 rating of the Innovair GOV36H2BA?
      The Innovair GOV36H2BA is rated at up to 20.0 SEER2 and 13.3 EER2 for cooling and up to 9.4 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 2 certified matchups SEER2 ranges from 18.6-20.0.
      Is the Innovair GOV36H2BA good for cold climates?
      Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 24,000 BTU/h at 5°F with a COP of 2.10, so it is still 2.1 times as efficient as electric resistance heat at that temperature.
      How much does the Innovair GOV36H2BA cost to run per year?
      At its rated efficiency it costs about $801-$2,267 a year in electricity in large U.S. cities, depending on climate and local rates - for example $1,005 in Phoenix and $1,908 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.
      Is the Innovair GOV36H2BA the same as the Wells WDHP-2436T-G?
      Yes, as far as the certified ratings go. ENERGY STAR lists 5 model numbers with identical efficiency, capacity and matchups, which means the same outdoor unit sold under a different brand or with a minor variant code (voltage, colour or region). The full list is on this page.
      Which indoor units work with the Innovair GOV36H2BA?
      ENERGY STAR lists 2 certified combinations for this outdoor unit. The highest-rated ones use GAV24B2A, GAV36B2A.
      What refrigerant does the Innovair GOV36H2BA 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 $1,006/yrYou save $751/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 Innovair GOV36H2BA
      3. What it replaces
      4. Price replace the example with your quote
      Heat pump, per year
      $1,006
      Current system, per year
      $1,756
      You save per year
      $751
      Payback
      17.3 years
      Net after 10 years
      -$5,495

      Cooling $598Heating $407Electricity used: 6,287 kWhSaved vs. a minimum-efficiency heat pump: $342

      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.

      Similar 3 ton models

      See all 302 3 ton central heat pumps, ranked

      Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of November 24, 2025. How we use the data.