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      3-ton central heat pump · QuietComfort 19 SEER2 VS HP

      Tempstar Q5H9V36*K*AAA

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

      Ranks #108 of 302 3 ton central heat pumps for cooling efficiency, and costs about $1,054 a year to run in a mixed climate like Atlanta.

      SEER2
      18.0 Cooling efficiency over a season
      Average · beats 66%
      HSPF2
      9.0 Heating efficiency over a season
      Average · beats 54%
      EER2
      13.5 Cooling efficiency on a 95°F day
      Excellent · beats 95%
      Heat at 5°F
      26,600 BTU/h71% of its 47°F output
      Very good · beats 71%

      A good fit if…

      • Your winters get properly cold - it is ENERGY STAR cold-climate certified, with 26,600 BTU/h at 5°F.
      • You want steady temperatures and quiet running - the compressor varies its speed.
      • You want a choice of indoor units - 3,150 certified pairings.

      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
      BrandTempstar
      Also sold asArcoaire, Airquest, Comfortmaker, Day & Night, Heil, Keeprite
      Outdoor unit modelQ5H9V36*K*AAA
      SeriesQuietComfort 19 SEER2 VS HP
      TypeCentral heat pump
      Nominal size3 ton
      CompressorVariable-speed units run longer at low powerContinuously variable
      RefrigerantR-454B
      Connected (smart) capableNo
      On the market sinceOctober 15, 2025
      Last certifiedOctober 7, 2026
      Cooling
      SEER2Seasonal efficiency, higher is better18.0 (range 15.2-18.0)
      EER2Efficiency at 95°F outdoors10.5-13.5
      Cooling capacity33,400-37,600 BTU/h
      Heating
      HSPF2Seasonal efficiency, higher is better7.8-9.0
      Capacity at 47°F31,800-37,400 BTU/h
      Capacity at 17°F24,800-37,600 BTU/h
      Capacity at 5°F24,600-26,600 BTU/h
      COP at 5°F2.0 = twice as efficient as a space heater1.90-2.18
      ENERGY STAR cold climateYes
      Heating output as it gets colder71% kept at 5°F

      Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with QFVA5D4821X at the standard test temperatures, in BTU/h:

      Certified matchups3,150 indoor units

      The same outdoor unit scores differently with each indoor unit and furnace. The 60 highest-rated of 3,150 are shown. Ask your installer for the AHRI reference number of the exact system you are quoted.

      Indoor unitFurnaceSEER2EER2HSPF2Heat @5°FAHRI ref.
      QFVA5D4821X · cold climate-18.013.59.025,400218695536
      QFVA5D4821X · cold climate-18.013.59.025,400218695534
      QFVA5D4821X · cold climate-18.013.59.025,400218695532
      QFVA5D4821X · cold climate-18.013.59.025,400218695530
      QFVA5D4821X · cold climate-18.013.59.025,400218695528
      QFVA5D4821X · cold climate-18.013.59.025,400218695526
      QFVA5D4821X · cold climate-18.013.59.025,400218695524
      FTMA5B48L0C · cold climate-17.012.59.025,000218008855
      FTMA5B48L0C · cold climate-17.012.59.025,000218008857
      FTMA5B48L0C · cold climate-17.012.59.025,000218008859
      FTMA5B48L0C · cold climate-17.012.59.025,000218008861
      FTMA5B48L0C · cold climate-17.012.59.025,000218008863
      FTMA5B48L0C · cold climate-17.012.59.025,000218008865
      FTMA5B48L0C · cold climate-17.012.59.025,000218008867
      QFVA5D3617X · cold climate-17.013.09.025,400218695520
      QFVA5D3617X · cold climate-17.013.09.025,400218695518
      QFVA5D3617X · cold climate-17.013.09.025,400218695516
      QFVA5D3617X · cold climate-17.013.09.025,400218695514
      QFVA5D3617X · cold climate-17.013.09.025,400218695512
      QFVA5D3617X · cold climate-17.013.09.025,400218695510
      QFVA5D3617X · cold climate-17.013.09.025,400218695508
      EVD5X38M17A · cold climate*80MSU0601716A*16.512.59.026,000217912782
      EVD5X38M17A · cold climate*80MSU0601716A*16.512.59.026,000217912783
      EVD5X38M17A · cold climate*80MSU0601716A*16.512.59.026,000217912786
      EVD5X38M17A · cold climate*80MSU0601716A*16.512.59.026,000217912784
      EVD5X38M17A · cold climate*80MSU0601716A*16.512.59.026,000217912781
      EVD5X38M17A · cold climate*80MSU0601716A*16.512.59.026,000217912785
      EVD5X38M17A · cold climate*80MSU0601716A*16.512.59.026,000217912787
      EVM5X49M21A · cold climate*80MSU0802120A*16.512.59.026,000217952529
      EVM5X49M21A · cold climate*80MSU0802120A*16.512.59.026,000217952531
      EVM5X49M21A · cold climate*80MSU0802120A*16.512.59.026,000217952530
      EVM5X49M21A · cold climate*80MSU0802120A*16.512.59.026,000217952532
      EVM5X49M21A · cold climate*80MSU0802120A*16.512.59.026,000217952534
      EVM5X49M21A · cold climate*80MSU0802120A*16.512.59.026,000217952533
      EVM5X49M21A · cold climate*80MSU0802120A*16.512.59.026,000217952535
      EVM5X43M21A · cold climate*80MSU0802120A*16.512.58.525,000217909578
      EVM5X43M21A · cold climate*80MSU0802120A*16.512.58.525,000217909577
      EVM5X43M21A · cold climate*80MSU0802120A*16.512.58.525,000217909579
      EVM5X43M21A · cold climate*80MSU0802120A*16.512.58.525,000217909580
      EVM5X43M21A · cold climate*80MSU0802120A*16.512.58.525,000217909581
      EVM5X43M21A · cold climate*80MSU0802120A*16.512.58.525,000217909582
      EVM5X43M21A · cold climate*80MSU0802120A*16.512.58.525,000217909583
      EVM5X49M21A · cold climate*80CTL0902120B*16.012.59.026,200217910936
      EVM5X49M21A · cold climate*80CTL0902120B*16.012.59.026,200217910935
      EVM5X49M21A · cold climate*80CTL0902120B*16.012.59.026,200217910937
      EVM5X49M21A · cold climate*80CTL0902120B*16.012.59.026,200217910938
      EVD5X38M17A · cold climate*80MSU0401712A*16.012.59.026,000217912766
      EVD5X38M17A · cold climate*80MSU0401712A*16.012.59.026,000217912767
      EVD5X38M17A · cold climate*80MSU0401712A*16.012.59.026,000217912768
      EVD5X38M17A · cold climate*80MSU0401712A*16.012.59.026,000217912769
      EVD5X38M17A · cold climate*80MSU0401712A*16.012.59.026,000217912770
      EVD5X38M17A · cold climate*80MSU0401712A*16.012.59.026,000217912771
      EVD5X38M17A · cold climate*80MSU0401712A*16.012.59.026,000217912772
      EVM5X49M21A · cold climate*80VSL0901716B*16.012.59.026,400217910890
      EVM5X49M21A · cold climate*80VSL0901716B*16.012.59.026,400217910891
      EVM5X49M21A · cold climate*80VSL0901716B*16.012.59.026,400217910892
      EVM5X49M21A · cold climate*80VSL0901716B*16.012.59.026,400217910893
      EVM5X49M21A · cold climate*80VSL0901716B*16.012.59.026,400217910895
      EVM5X49M21A · cold climate*80VSL0901716B*16.012.59.026,400217910896
      EVM5X49M21A · cold climate*80VSL0901716B*16.012.59.026,400217910894
      Yearly running cost in 10 large cities$930-$2,530

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

      Questions5
      What is the SEER2 rating of the Tempstar Q5H9V36*K*AAA?
      The Tempstar Q5H9V36*K*AAA is rated at up to 18.0 SEER2 and 13.5 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 3150 certified matchups SEER2 ranges from 15.2-18.0.
      Is the Tempstar Q5H9V36*K*AAA good for cold climates?
      Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 26,600 BTU/h at 5°F with a COP of 2.18, so it is still 2.2 times as efficient as electric resistance heat at that temperature.
      How much does the Tempstar Q5H9V36*K*AAA cost to run per year?
      At its rated efficiency it costs about $930-$2,530 a year in electricity in large U.S. cities, depending on climate and local rates - for example $1,153 in Phoenix and $2,118 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 Tempstar Q5H9V36*K*AAA?
      ENERGY STAR lists 3150 certified combinations for this outdoor unit. The highest-rated ones use QFVA5D4821X, FTMA5B48L0C, QFVA5D3617X.
      What refrigerant does the Tempstar Q5H9V36*K*AAA 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 $1,147/yrYou save $699/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 Tempstar Q5H9V36*K*AAA
      3. What it replaces
      4. Price replace the example with your quote
      Heat pump, per year
      $1,147
      Current system, per year
      $1,845
      You save per year
      $699
      Payback
      19.3 years
      Net after 10 years
      -$6,512

      Cooling $696Heating $450Electricity used: 7,167 kWhSaved vs. a minimum-efficiency heat pump: $270

      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 October 7, 2026. How we use the data.