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

      Heil N5H9V36*K*AAA

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

      Ranks #107 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 - 3,600 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
      BrandHeil
      Also sold asDay & Night, Keeprite, Tempstar, Arcoaire, Airquest, Comfortmaker, ACIQ
      Outdoor unit modelN5H9V36*K*AAA
      SeriesPerformance 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 sinceJanuary 14, 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 matchups3,600 indoor units

      The same outdoor unit scores differently with each indoor unit and furnace. The 60 highest-rated of 3,600 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-18.013.59.025,400218695535
      QFVA5D4821X · cold climate-18.013.59.025,400218695533
      QFVA5D4821X · cold climate-18.013.59.025,400218695531
      QFVA5D4821X · cold climate-18.013.59.025,400218695529
      QFVA5D4821X · cold climate-18.013.59.025,400218695527
      QFVA5D4821X · cold climate-18.013.59.025,400218695525
      QFVA5D4821X · cold climate-18.013.59.025,400218695523
      QFVA5D4821X · cold climate-18.013.59.025,400218822095
      FTMA5B48L0C · cold climate-17.012.59.025,000218008854
      FTMA5B48L0C · cold climate-17.012.59.025,000218008856
      FTMA5B48L0C · cold climate-17.012.59.025,000218008858
      FTMA5B48L0C · cold climate-17.012.59.025,000218008860
      FTMA5B48L0C · cold climate-17.012.59.025,000218008862
      FTMA5B48L0C · cold climate-17.012.59.025,000218008864
      FTMA5B48L0C · cold climate-17.012.59.025,000218008866
      FTMA5B48L0C · cold climate-17.012.59.025,000218355717
      QFVA5D3617X · cold climate-17.013.09.025,400218695519
      QFVA5D3617X · cold climate-17.013.09.025,400218695517
      QFVA5D3617X · cold climate-17.013.09.025,400218695515
      QFVA5D3617X · cold climate-17.013.09.025,400218695513
      QFVA5D3617X · cold climate-17.013.09.025,400218695511
      QFVA5D3617X · cold climate-17.013.09.025,400218695509
      QFVA5D3617X · cold climate-17.013.09.025,400218695507
      QFVA5D3617X · cold climate-17.013.09.025,400218822094
      EVD5X38M17A · cold climate*80MSU0601716A*16.512.59.026,000217912774
      EVD5X38M17A · cold climate*80MSU0601716A*16.512.59.026,000217912775
      EVD5X38M17A · cold climate*80MSU0601716A*16.512.59.026,000217912776
      EVD5X38M17A · cold climate*80MSU0601716A*16.512.59.026,000217912777
      EVD5X38M17A · cold climate*80MSU0601716A*16.512.59.026,000217912778
      EVD5X38M17A · cold climate*80MSU0601716A*16.512.59.026,000217912779
      EVD5X38M17A · cold climate*80MSU0601716A*16.512.59.026,000217912780
      EVM5X49M21A · cold climate*80MSU0802120A*16.512.59.026,000217952522
      EVM5X49M21A · cold climate*80MSU0802120A*16.512.59.026,000217952523
      EVM5X49M21A · cold climate*80MSU0802120A*16.512.59.026,000217952524
      EVM5X49M21A · cold climate*80MSU0802120A*16.512.59.026,000217952525
      EVM5X49M21A · cold climate*80MSU0802120A*16.512.59.026,000217952527
      EVM5X49M21A · cold climate*80MSU0802120A*16.512.59.026,000217952526
      EVM5X49M21A · cold climate*80MSU0802120A*16.512.59.026,000217952528
      EVD5X38M17A · cold climate*80MSU0601716A*16.512.59.026,000218017287
      EVM5X49M21A · cold climate*80MSU0802120A*16.512.59.026,000218020887
      EVM5X43M21A · cold climate*80MSU0802120A*16.512.58.525,000217909570
      EVM5X43M21A · cold climate*80MSU0802120A*16.512.58.525,000217909571
      EVM5X43M21A · cold climate*80MSU0802120A*16.512.58.525,000217909572
      EVM5X43M21A · cold climate*80MSU0802120A*16.512.58.525,000217909573
      EVM5X43M21A · cold climate*80MSU0802120A*16.512.58.525,000217909574
      EVM5X43M21A · cold climate*80MSU0802120A*16.512.58.525,000217909575
      EVM5X43M21A · cold climate*80MSU0802120A*16.512.58.525,000217909576
      EVM5X43M21A · cold climate*80MSU0802120A*16.512.58.525,000218019575
      EVM5X49M21A · cold climate*80CTL0902120B*16.012.59.026,200217910928
      EVM5X49M21A · cold climate*80CTL0902120B*16.012.59.026,200217910929
      EVM5X49M21A · cold climate*80CTL0902120B*16.012.59.026,200217910930
      EVM5X49M21A · cold climate*80CTL0902120B*16.012.59.026,200217910931
      EVM5X49M21A · cold climate*80CTL0902120B*16.012.59.026,200217910932
      EVM5X49M21A · cold climate*80CTL0902120B*16.012.59.026,200217910933
      EVM5X49M21A · cold climate*80CTL0902120B*16.012.59.026,200217910934
      EVD5X38M17A · cold climate*80MSU0401712A*16.012.59.026,000217912765
      EVD5X38M17A · cold climate*80CTL0701412B*16.012.09.026,400217912806
      EVD5X38M17A · cold climate*80CTL0701412B*16.012.09.026,400217912804
      EVD5X38M17A · cold climate*80CTL0701412B*16.012.09.026,400217912805
      EVM5X49M21A · cold climate*80VSL0901716B*16.012.59.026,400217910883
      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 Heil N5H9V36*K*AAA?
      The Heil N5H9V36*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 3600 certified matchups SEER2 ranges from 15.2-18.0.
      Is the Heil N5H9V36*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 Heil N5H9V36*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 Heil N5H9V36*K*AAA?
      ENERGY STAR lists 3600 certified combinations for this outdoor unit. The highest-rated ones use QFVA5D4821X, FTMA5B48L0C, QFVA5D3617X.
      What refrigerant does the Heil N5H9V36*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 Heil N5H9V36*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.