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      2-ton central heat pump · 4SHP22LX SERIES

      Armstrong Air 4SHP22LX124P-**A

      Excellent cooling efficiency and average heating efficiency for a 2-ton central heat pump, but not rated for cold climates.

      Ranks #17 of 331 2 ton central heat pumps for cooling efficiency, and costs about $625 a year to run in a mixed climate like Atlanta.

      SEER2
      21.0 Cooling efficiency over a season
      Excellent · beats 97%
      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
      16,100 BTU/h72% of its 47°F output
      Excellent · beats 90%

      A good fit if…

      • You want low cooling bills - its SEER2 beats 97% of central heat pumps.
      • You want steady temperatures and quiet running - the compressor varies its speed.

      Think twice if…

      • You often see nights below 0°F - it is not cold-climate certified.
      • You want the newest refrigerant - it uses R-410A, which is being phased down.

      Calculate my running cost

      Details

      Specifications2 ton, R-410A
      General
      BrandArmstrong Air
      Also sold asAIREASE
      Outdoor unit model4SHP22LX124P-**A
      Series4SHP22LX SERIES
      TypeCentral heat pump
      Nominal size2 ton
      CompressorVariable-speed units run longer at low powerContinuously variable
      RefrigerantR-410A
      Connected (smart) capableNo
      On the market sinceMarch 13, 2023
      Last certifiedMay 27, 2026
      Cooling
      SEER2Seasonal efficiency, higher is better21.0 (range 17.5-21.0)
      EER2Efficiency at 95°F outdoors13.0-13.5
      Cooling capacity22,800-24,000 BTU/h
      Heating
      HSPF2Seasonal efficiency, higher is better8.8-9.0
      Capacity at 47°F21,000-22,400 BTU/h
      Capacity at 17°F14,100-14,300 BTU/h
      Capacity at 5°F14,900-16,100 BTU/h
      COP at 5°F2.0 = twice as efficient as a space heater2.14-2.32
      ENERGY STAR cold climateNo
      Heating output as it gets colder72% kept at 5°F

      Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with BCE7S30M*4X at the standard test temperatures, in BTU/h:

      Certified matchups6 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.
      BCE7S30M*4X21.013.59.016,100211729602
      BCE7S30M*4X21.013.59.016,100211729601
      BCE5E30M20.013.58.814,900211729606
      BCE5E30M20.013.58.814,900211729604
      BCE5E24M17.513.08.815,500211729605
      BCE5E24M17.513.08.815,500211729603
      Yearly running cost in 10 large cities$530-$1,519

      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 4SHP22LX124P-**A?
      The Armstrong Air 4SHP22LX124P-**A is rated at up to 21.0 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 6 certified matchups SEER2 ranges from 17.5-21.0.
      Is the Armstrong Air 4SHP22LX124P-**A good for cold climates?
      It is not cold-climate certified: none of its matchups meet the ENERGY STAR cold-climate criteria (a COP of at least 1.75 at 5°F among other limits). In places with frequent sub-zero nights, pick a cold-climate 2-ton model.
      How much does the Armstrong Air 4SHP22LX124P-**A cost to run per year?
      At its rated efficiency it costs about $530-$1,519 a year in electricity in large U.S. cities, depending on climate and local rates - for example $667 in Phoenix and $1,280 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 4SHP22LX124P-**A?
      ENERGY STAR lists 6 certified combinations for this outdoor unit. The highest-rated ones use BCE7S30M*4X, BCE5E30M, BCE5E24M.
      What refrigerant does the Armstrong Air 4SHP22LX124P-**A 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 $669/yrYou save $521/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 4SHP22LX124P-**A
      3. What it replaces
      4. Price replace the example with your quote
      Heat pump, per year
      $669
      Current system, per year
      $1,191
      You save per year
      $521
      Payback
      17.3 years
      Net after 10 years
      -$3,787

      Cooling $396Heating $274Electricity used: 4,183 kWhSaved vs. a minimum-efficiency heat pump: $240

      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 May 27, 2026. How we use the data.