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      2-ton central heat pump · Platinum 19

      American Standard 4A6L9024A1

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

      Ranks #176 of 331 2 ton central heat pumps for cooling efficiency, and costs about $666 a year to run in a mixed climate like Atlanta.

      SEER2
      18.0 Cooling efficiency over a season
      Average · beats 66%
      HSPF2
      8.7 Heating efficiency over a season
      Average · beats 47%
      EER2
      12.0 Cooling efficiency on a 95°F day
      Average · beats 64%
      Heat at 5°F
      - Not reported by the maker

      A good fit if…

      • You want steady temperatures and quiet running - the compressor varies its speed.
      • You want a choice of indoor units - 13 certified pairings.

      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
      BrandAmerican Standard
      Outdoor unit model4A6L9024A1
      SeriesPlatinum 19
      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 certifiedMay 3, 2023
      Cooling
      SEER2Seasonal efficiency, higher is better18.0 (range 17.0-18.0)
      EER2Efficiency at 95°F outdoors11.7-12.5
      Cooling capacity22,400-23,800 BTU/h
      Heating
      HSPF2Seasonal efficiency, higher is better8.2-8.7
      Capacity at 47°F19,700-21,600 BTU/h
      Capacity at 17°F13,300-14,400 BTU/h
      Capacity at 5°F-
      COP at 5°F2.0 = twice as efficient as a space heater-
      ENERGY STAR cold climateNo
      Heating output as it gets colder

      Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with 4PX*BD36BS3 at the standard test temperatures, in BTU/h:

      Certified matchups13 indoor units

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

      Indoor unitFurnaceSEER2EER2HSPF2Heat @5°FAHRI ref.
      4PX*BD36BS3S8V2B060M4PCA18.012.08.7-210692201
      4PX*BD36BS3S8V2A040M3PCA18.012.08.2-210691929
      4PX*BD30BS3S8V2B060M4PDA17.511.78.7-211089020
      4PX*BD30BS3S8V2B080M4PDA17.511.78.7-211089018
      4PX*BD30BS3S8V2B080M4PCA17.511.78.7-210692200
      4PX*BD30BS3S8V2B060M4PCA17.511.78.7-210692199
      4PX*BU42BS3S8V2A040M3PCA17.512.58.5-210692205
      4TXCB003DS3S8V2B080M4PCA17.012.08.7-210692207
      4TXCB003DS3S8V2A040M3PCA17.012.08.7-210692206
      4PX*BU30BS3S8V2B080M4PCA17.012.08.7-210692204
      4TXCB003DS3S8V2B060M4PCA17.012.08.7-210691932
      4PX*BU30BS3S8V2B060M4PCA17.012.08.7-210691930
      4PX*BD30BS3S8V2A040M3PCA17.012.08.5-210692198
      Yearly running cost in 10 large cities$610-$1,581

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

      Questions5
      What is the SEER2 rating of the American Standard 4A6L9024A1?
      The American Standard 4A6L9024A1 is rated at up to 18.0 SEER2 and 12.0 EER2 for cooling and up to 8.7 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 13 certified matchups SEER2 ranges from 17.0-18.0.
      Is the American Standard 4A6L9024A1 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 American Standard 4A6L9024A1 cost to run per year?
      At its rated efficiency it costs about $610-$1,581 a year in electricity in large U.S. cities, depending on climate and local rates - for example $745 in Phoenix and $1,315 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 American Standard 4A6L9024A1?
      ENERGY STAR lists 13 certified combinations for this outdoor unit. The highest-rated ones use 4PX*BD36BS3, 4PX*BD30BS3, 4PX*BU42BS3.
      What refrigerant does the American Standard 4A6L9024A1 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 $736/yrYou save $441/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 American Standard 4A6L9024A1
      3. What it replaces
      4. Price replace the example with your quote
      Heat pump, per year
      $736
      Current system, per year
      $1,177
      You save per year
      $441
      Payback
      20.4 years
      Net after 10 years
      -$4,586

      Cooling $458Heating $278Electricity used: 4,598 kWhSaved vs. a minimum-efficiency heat pump: $163

      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.

      Similar 2 ton models

      See all 331 2 ton central heat pumps, ranked

      Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of May 3, 2023. How we use the data.