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      2-ton central heat pump · 4SHP18LX SERIES

      Armstrong Air 4SHP18LX136P

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

      Ranks #61 of 331 2 ton central heat pumps for cooling efficiency, and costs about $704 a year to run in a mixed climate like Atlanta.

      SEER2
      19.0 Cooling efficiency over a season
      Very good · beats 85%
      HSPF2
      8.5 Heating efficiency over a season
      Below average · beats 38%
      EER2
      12.3 Cooling efficiency on a 95°F day
      Very good · beats 76%
      Heat at 5°F
      19,600 BTU/h63% of its 47°F output
      Very good · beats 80%

      A good fit if…

      • You want low cooling bills - its SEER2 beats 85% of central heat pumps.
      • You want steady temperatures and quiet running - the compressor varies its speed.
      • You want a choice of indoor units - 319 certified pairings.

      Think twice if…

      • You often see nights below 0°F - it is not cold-climate certified.
      • You mainly need heat - its HSPF2 is below average for central heat pumps.
      • 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 model4SHP18LX136P
      Series4SHP18LX SERIES
      TypeCentral heat pump
      Nominal size2 ton
      CompressorVariable-speed units run longer at low powerContinuously variable
      RefrigerantR-410A
      Connected (smart) capableNo
      On the market sinceJanuary 1, 2023
      Last certifiedJune 3, 2026
      Cooling
      SEER2Seasonal efficiency, higher is better19.0 (range 16.0-19.0)
      EER2Efficiency at 95°F outdoors11.0-12.3
      Cooling capacity22,000-35,000 BTU/h
      Heating
      HSPF2Seasonal efficiency, higher is better7.8-8.5
      Capacity at 47°F22,000-35,000 BTU/h
      Capacity at 17°F14,900-23,600 BTU/h
      Capacity at 5°F10,900-19,600 BTU/h
      COP at 5°F2.0 = twice as efficient as a space heater1.82-2.22
      ENERGY STAR cold climateNo
      Heating output as it gets colder63% kept at 5°F

      Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with EAH1P30B+TDR+TXV at the standard test temperatures, in BTU/h:

      Certified matchups319 indoor units

      The same outdoor unit scores differently with each indoor unit and furnace. The 60 highest-rated of 319 are shown. Ask your installer for the AHRI reference number of the exact system you are quoted.

      Indoor unitFurnaceSEER2EER2HSPF2Heat @5°FAHRI ref.
      EAH1P30B+TDR+TXVA96US2V070B1219.012.38.514,900210740435
      EAH1P30B+TDR+TXVA96US2V045B1219.012.38.515,000210740431
      EAH1P30B+TDR+TXVA97US2V060B12X19.012.38.514,900210740443
      EAH1P30B+TDR+TXVA97US2V040B12X19.012.38.514,900210740439
      EAH1P30B+TDR+TXVA97USMV070B1219.012.38.514,900211644250
      BCE7E30M*4X-19.012.38.515,500210821881
      BCE7S24M*4X-19.012.38.515,400210821883
      BCE7S30M*4X-19.012.38.515,400210821885
      BCE7E30M*4X-19.012.38.515,500210739943
      BCE7S30M*4X-19.012.38.515,400210739951
      BCE7S24M*4X-19.012.38.515,400210739947
      EAH1P30B+TDR+TXVA96US2V070B1219.012.38.514,900210822098
      EAH1P30B+TDR+TXVA97US2V060B12X19.012.38.514,900210822101
      EAH1P30B+TDR+TXVA97US2V040B12X19.012.38.514,900210822100
      EAH1P30B+TDR+TXVA96US2V045B1219.012.38.515,000210822097
      EAH1P30B+TDR+TXVA97USMV070B1219.012.38.514,900211632219
      EAH1P30B+TDR+TXVA97US2V045B1219.012.38.515,000212539322
      EAH1P30B+TDR+TXVA97US2V045B1219.012.38.515,000212539405
      EAH1P30B+TDR+TXVA97US2V070B1219.012.38.514,900212539324
      EAH1P30B+TDR+TXVA98USMV070B1219.012.38.514,900212539166
      EAH1P30B+TDR+TXVA97US2V070B1219.012.38.514,900212539407
      EAH1P30B+TDR+TXVA98USMV070B1219.012.38.514,900212539205
      BCE7S36M*4X + TSTAT-19.011.78.518,400213249357
      BCE7S30M*4X + TSTAT-19.012.38.515,300213249356
      BCE7S24M*4X + TSTAT-19.012.38.514,500213249355
      7EH30BX-0*+TDRA96US2V045B1219.012.38.515,000214730013
      7EH30BX-0*+TDRA96US2V070B1219.012.38.514,900214730014
      7EH30BX-0*+TDRA97US2V040B12X19.012.38.514,900214730018
      7EH30BX-0*+TDRA97US2V045B1219.012.38.515,000214730020
      7EH30BX-0*+TDRA97US2V060B12X19.012.38.514,900214730021
      7EH30BX-0*+TDRA97USMV070B1219.012.38.514,900214730024
      7EH30BX-0*+TDRA98USMV070B1219.012.38.514,900214730026
      7EH30BX-0*+TDRA97US2V070B1219.012.38.514,900214730023
      7EH30BX-0*+TDRA96US2V045B1219.012.38.515,000214729344
      7EH30BX-0*+TDRA96US2V070B1219.012.38.514,900214729345
      7EH30BX-0*+TDRA97US2V040B12X19.012.38.514,900214729349
      7EH30BX-0*+TDRA97US2V045B1219.012.38.515,000214729350
      7EH30BX-0*+TDRA97US2V060B12X19.012.38.514,900214729351
      7EH30BX-0*+TDRA97US2V070B1219.012.38.514,900214729352
      7EH30BX-0*+TDRA97USMV070B1219.012.38.514,900214729353
      7EH30BX-0*+TDRA98USMV070B1219.012.38.514,900214729354
      7AH2AE30PX-0-19.012.38.515,500215219057
      7AH2AE30PX-0-19.012.38.515,500215219058
      7EH48BX-0*+TDRA97UH2E070B1219.011.08.518,300214729409
      7EH48BX-0*+TDRA97UH2E070B1219.011.08.518,300214730087
      EAH1P48B+TDR+TXVA97UH2E070B1219.011.08.518,300213928572
      EAH1P48B+TDR+TXVA97UH2E070B1219.011.08.518,300213928588
      E*1P23B+TDR+TXVA96US2V045B1219.012.38.114,300210821910
      E*1P23B+TDR+TXVA97US2V040B12X19.012.38.114,300210821913
      E*1P23B+TDR+TXVA96US2V070B1219.012.38.114,200210821911
      ED1P24B+TDR+TXVA97DSMV070B1219.012.38.114,700211644259
      E*1P23B+TDR+TXVA96US2V045B1219.012.38.114,300210740009
      E*1P23B+TDR+TXVA96US2V070B1219.012.38.114,200210740013
      E*1P23B+TDR+TXVA97US2V040B12X19.012.38.114,300210740017
      E*1P23B+TDR+TXVA97USMV070B1219.012.38.114,200211632183
      EAC4X30B+TDRA97USMV070B1219.012.38.114,800211632213
      EA(C,U)1P30B+TDR+TXVA97USMV070B1219.012.38.114,800211632198
      ED1P24B+TDR+TXVA97DSMV070B1219.012.38.114,700211632228
      E*1P23B+TDR+TXVA97USMV070B1219.012.38.114,200211644214
      EA(C,U)1P30B+TDR+TXVA97USMV070B1219.012.38.114,800211644229
      Yearly running cost in 10 large cities$586-$1,717

      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 4SHP18LX136P?
      The Armstrong Air 4SHP18LX136P is rated at up to 19.0 SEER2 and 12.3 EER2 for cooling and up to 8.5 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 319 certified matchups SEER2 ranges from 16.0-19.0.
      Is the Armstrong Air 4SHP18LX136P 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 4SHP18LX136P cost to run per year?
      At its rated efficiency it costs about $586-$1,717 a year in electricity in large U.S. cities, depending on climate and local rates - for example $743 in Phoenix and $1,450 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 4SHP18LX136P?
      ENERGY STAR lists 319 certified combinations for this outdoor unit. The highest-rated ones use EAH1P30B+TDR+TXV, BCE7E30M*4X, BCE7S24M*4X.
      What refrigerant does the Armstrong Air 4SHP18LX136P 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 $748/yrYou save $469/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 4SHP18LX136P
      3. What it replaces
      4. Price replace the example with your quote
      Heat pump, per year
      $748
      Current system, per year
      $1,217
      You save per year
      $469
      Payback
      19.2 years
      Net after 10 years
      -$4,313

      Cooling $437Heating $311Electricity used: 4,676 kWhSaved vs. a minimum-efficiency heat pump: $185

      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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      See all 331 2 ton central heat pumps, ranked

      Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of June 3, 2026. How we use the data.