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      3-ton central heat pump · A7CP21V SERIES

      Armstrong Air A7CP21V36P-**A

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

      Ranks #23 of 302 3 ton central heat pumps for cooling efficiency, and costs about $831 a year to run in a mixed climate like Atlanta.

      SEER2
      20.0 Cooling efficiency over a season
      Excellent · beats 94%
      HSPF2
      10.4 Heating efficiency over a season
      Excellent · beats 94%
      EER2
      11.7 Cooling efficiency on a 95°F day
      Average · beats 43%
      Heat at 5°F
      25,400 BTU/h76% of its 47°F output
      Excellent · beats 97%

      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 25,400 BTU/h at 5°F.
      • It will heat most of the year - its HSPF2 beats 94% of central heat pumps.
      • 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
      BrandArmstrong Air
      Also sold asAIREASE, AC Pro
      Outdoor unit modelA7CP21V36P-**A
      SeriesA7CP21V SERIES
      TypeCentral heat pump
      Nominal size3 ton
      CompressorVariable-speed units run longer at low powerContinuously variable
      RefrigerantR-454B
      Connected (smart) capableNo
      On the market sinceMarch 7, 2025
      Last certifiedSeptember 22, 2026
      Cooling
      SEER2Seasonal efficiency, higher is better20.0 (range 15.2-20.0)
      EER2Efficiency at 95°F outdoors11.0-12.2
      Cooling capacity32,000-34,800 BTU/h
      Heating
      HSPF2Seasonal efficiency, higher is better8.5-10.4
      Capacity at 47°F30,000-34,800 BTU/h
      Capacity at 17°F26,600-32,400 BTU/h
      Capacity at 5°F18,400-25,400 BTU/h
      COP at 5°F2.0 = twice as efficient as a space heater1.84-2.46
      ENERGY STAR cold climateYes
      Heating output as it gets colder76% kept at 5°F

      Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with 7AH2AV36PXC at the standard test temperatures, in BTU/h:

      Certified matchups529 indoor units

      The same outdoor unit scores differently with each indoor unit and furnace. The 60 highest-rated of 529 are shown. Ask your installer for the AHRI reference number of the exact system you are quoted.

      Indoor unitFurnaceSEER2EER2HSPF2Heat @5°FAHRI ref.
      7AH2AV36PXC · cold climate-20.011.710.025,400217117575
      7AH2AV36PXC · cold climate-20.011.710.025,400217117579
      7AH2AV36PXC · cold climate-20.011.710.025,400217465755
      7AH1AV42PX- · cold climate-20.012.29.023,800217122071
      7AH1AV42PX- · cold climate-20.012.29.023,800217122172
      7AH1AV42PX- · cold climate-20.012.29.023,800217465906
      7E[C,U]30BX-**+TDRA80US2V090B12*19.511.710.422,800217446260
      7E[C,U]30BX-**+TDRA80US2V090B12*19.511.710.422,800217446491
      7E[C,U]30BX-**+TDRA80US2V090B12*19.511.710.422,800217466065
      7ED30/36BX-**+TDRA97DSMV070B12S*19.511.29.219,200217446278
      7ED30/36BX-**+TDRA97DSMV070B12S*19.511.29.219,200217446509
      7ED30/36BX-**+TDRA97DSMV070B12S*19.511.29.219,200217466083
      7AH1AE42PX- · cold climate-19.511.78.524,400217122222
      7AH1AE42PX- · cold climate-19.511.78.524,400217122121
      7AH1AV36PX- · cold climate-19.512.08.524,200217122123
      7AH1AV36PX- · cold climate-19.512.08.524,200217122224
      7AH1AE42PX- · cold climate-19.511.78.524,400217465956
      7AH1AV36PX- · cold climate-19.512.08.524,200217465958
      7E[C,U]30AX-**+TDRA80UH2E070A12*19.011.510.422,400217446243
      7E[C,U]30AX-**+TDRA80UH1E045A12*19.011.510.422,400217446244
      7E[C,U]30BX-**+TDRA80UH2E090B12*19.011.710.422,400217446250
      7E[C,U]30BX-**+TDRA80US2V090B16*19.011.510.422,800217446261
      7E[C,U]30BX-**+TDRA80US2V080B16X*19.011.210.423,000217446259
      7E[C,U]30BX-**+TDRA80US2V090B16L*19.011.510.422,800217446262
      7E[C,U]30BX-**+TDRA97US2V040B12X*19.011.210.423,200217446263
      7E[C,U]30BX-**+TDRA98USMV070B12S*19.011.510.422,800217446265
      7E[C,U]30BX-**+TDRA97US2V045B12S*19.011.210.423,000217446268
      7E[C,U]30BX-**+TDRA97US2V070B12S*19.011.510.423,000217446269
      7E[C,U]30AX-**+TDRA80UH1E060A12X*19.011.210.422,600217446472
      7E[C,U]30AX-**+TDRA80UH2E070A12*19.011.510.422,400217446474
      7E[C,U]30AX-**+TDRA80UH1E045A12*19.011.510.422,400217446475
      7E[C,U]30BX-**+TDRA80UH2E090B12*19.011.710.422,400217446481
      7E[C,U]30BX-**+TDRA80US2V080B16X*19.011.210.423,000217446490
      7E[C,U]30BX-**+TDRA80US2V090B16*19.011.510.422,800217446492
      7E[C,U]30BX-**+TDRA80US2V090B16L*19.011.510.422,800217446493
      7E[C,U]30BX-**+TDRA97US2V040B12X*19.011.210.423,200217446494
      7E[C,U]30BX-**+TDRA98USMV070B12S*19.011.510.422,800217446496
      7E[C,U]30BX-**+TDRA97US2V045B12S*19.011.210.423,000217446499
      7E[C,U]30AX-**+TDRA80UH1E040A12X*19.011.210.422,600217446609
      7E[C,U]30BX-**+TDRA97US2V070B12S*19.011.510.423,000217446500
      7E[C,U]30AX-**+TDRA80UH1E040A12X*19.011.210.422,600217446378
      7E[C,U]30AX-**+TDRA80UH1E060A12X*19.011.210.422,600217446241
      7E[C,U]30AX-**+TDRA80UH1E040A12X*19.011.210.422,600217466177
      7E[C,U]30AX-**+TDRA80UH1E060A12X*19.011.210.422,600217466046
      7E[C,U]30AX-**+TDRA80UH2E070A12*19.011.510.422,400217466048
      7E[C,U]30AX-**+TDRA80UH1E045A12*19.011.510.422,400217466049
      7E[C,U]30BX-**+TDRA80UH2E090B12*19.011.710.422,400217466055
      7E[C,U]30BX-**+TDRA80US2V080B16X*19.011.210.423,000217466064
      7E[C,U]30BX-**+TDRA80US2V090B16*19.011.510.422,800217466066
      7E[C,U]30BX-**+TDRA80US2V090B16L*19.011.510.422,800217466067
      7E[C,U]30BX-**+TDRA97US2V040B12X*19.011.210.423,200217466068
      7E[C,U]30BX-**+TDRA98USMV070B12S*19.011.510.422,800217466070
      7E[C,U]30BX-**+TDRA97US2V045B12S*19.011.210.423,000217466073
      7E[C,U]30BX-**+TDRA97US2V070B12S*19.011.510.423,000217466074
      7EH30BX-**+TDR · cold climateA97US2V070B12S*19.011.29.422,800217446320
      7EH30BX-**+TDR · cold climateA80US2V090B12*19.011.09.422,600217446306
      7EH30BX-**+TDR · cold climateA80US2V090B16*19.011.59.422,800217446307
      7EH30BX-**+TDR · cold climateA98USMV070B12S*19.011.09.422,800217446310
      7EH30BX-**+TDR · cold climateA80US2V090B12*19.011.09.422,600217446537
      7EH30BX-**+TDR · cold climateA80US2V090B16*19.011.59.422,800217446538
      Yearly running cost in 10 large cities$783-$1,954

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

      Questions5
      What is the SEER2 rating of the Armstrong Air A7CP21V36P-**A?
      The Armstrong Air A7CP21V36P-**A is rated at up to 20.0 SEER2 and 11.7 EER2 for cooling and up to 10.4 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 529 certified matchups SEER2 ranges from 15.2-20.0.
      Is the Armstrong Air A7CP21V36P-**A good for cold climates?
      Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 25,400 BTU/h at 5°F with a COP of 2.46, so it is still 2.5 times as efficient as electric resistance heat at that temperature.
      How much does the Armstrong Air A7CP21V36P-**A cost to run per year?
      At its rated efficiency it costs about $783-$1,954 a year in electricity in large U.S. cities, depending on climate and local rates - for example $945 in Phoenix and $1,617 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 Armstrong Air A7CP21V36P-**A?
      ENERGY STAR lists 529 certified combinations for this outdoor unit. The highest-rated ones use 7AH2AV36PXC, 7AH1AV42PX-, 7E[C,U]30BX-**+TDR.
      What refrigerant does the Armstrong Air A7CP21V36P-**A 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 $928/yrYou save $765/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 Armstrong Air A7CP21V36P-**A
      3. What it replaces
      4. Price replace the example with your quote
      Heat pump, per year
      $928
      Current system, per year
      $1,693
      You save per year
      $765
      Payback
      16.3 years
      Net after 10 years
      -$4,854

      Cooling $588Heating $340Electricity used: 5,801 kWhSaved vs. a minimum-efficiency heat pump: $366

      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 September 22, 2026. How we use the data.