HVAC Rated
    Menu

      4-ton central heat pump · XV18I

      American Standard 4A6V8X48A1

      Average cooling efficiency and below average heating efficiency for a 4-ton central heat pump, but not rated for cold climates.

      Ranks #97 of 319 4 ton central heat pumps for cooling efficiency, and costs about $1,339 a year to run in a mixed climate like Atlanta.

      SEER2
      18.0 Cooling efficiency over a season
      Average · beats 66%
      HSPF2
      8.5 Heating efficiency over a season
      Below average · beats 38%
      EER2
      12.0 Cooling efficiency on a 95°F day
      Average · beats 64%
      Heat at 5°F
      29,400 BTU/h67% of its 47°F output
      Below average · beats 39%

      A good fit if…

      • You want steady temperatures and quiet running - the compressor varies its speed.
      • You want a choice of indoor units - 208 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

      Specifications4 ton, R-410A
      General
      BrandAmerican Standard
      Outdoor unit model4A6V8X48A1
      SeriesXV18I
      TypeCentral heat pump
      Nominal size4 ton
      CompressorVariable-speed units run longer at low powerContinuously variable
      RefrigerantR-410A
      Connected (smart) capableNo
      On the market sinceJanuary 1, 2023
      Last certifiedJuly 9, 2025
      Cooling
      SEER2Seasonal efficiency, higher is better18.0 (range 18.0)
      EER2Efficiency at 95°F outdoors11.0-12.0
      Cooling capacity44,000-47,500 BTU/h
      Heating
      HSPF2Seasonal efficiency, higher is better8.0-8.5
      Capacity at 47°F41,000-46,000 BTU/h
      Capacity at 17°F35,200-37,800 BTU/h
      Capacity at 5°F27,400-29,400 BTU/h
      COP at 5°F2.0 = twice as efficient as a space heater1.68-2.00
      ENERGY STAR cold climateNo
      Heating output as it gets colder67% kept at 5°F

      Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with 4PX*CU60BS3+P0V0C000M50SC+RP at the standard test temperatures, in BTU/h:

      Certified matchups208 indoor units

      The same outdoor unit scores differently with each indoor unit and furnace. The 60 highest-rated of 208 are shown. Ask your installer for the AHRI reference number of the exact system you are quoted.

      Indoor unitFurnaceSEER2EER2HSPF2Heat @5°FAHRI ref.
      4PX*CU60BS3+P0V0C000M50SC+RP-18.012.08.528,600207805697
      4PX*DU60BS3+P0V0C000M50SC+RP-18.012.08.527,600207805709
      4PX*DU60BS3+P0V0D000M50SC+RP-18.012.08.528,400207805708
      4TXCD008DS3+P0V0D000M50SC+RP-18.012.08.528,800207805713
      4TXCC009DS3+P0V0C000M50SC+RP-18.012.08.528,600207805712
      4TXCD010DS3+P0V0D000M50SC+RP-18.012.08.528,400207805716
      4TXCD010DS3+P0V0C000M50SC+RP-18.012.08.527,600207805715
      4PX*CD60BS3+P0V0C000M50SC+RP-18.012.08.528,400207805693
      4TXCD010DS3S8V2C080M5PDA18.011.78.527,400211089210
      4PX*DU60BS3S8V2C080M5PDA18.011.78.527,400211089205
      4PX*DU60BS3S8V2C100M5PDA18.011.78.527,600211081488
      4TXCD010DS3S8V2C100M5PDA18.011.78.527,600211081496
      4PX*CU60BS3S8V2C080M5PDA18.011.78.528,400211081482
      4PX*CD60BS3S8V2C100M5PDA18.011.78.528,600211081477
      4TXCC009DS3S8V2C100M5PDA18.011.78.528,600211081494
      4TXCD008DS3S8V2D120M5PDA18.011.78.528,800211081495
      4PX*CD60BS3S8V2C080M5PDA18.011.78.528,400211081476
      4PX*DU60BS3S8V2D120M5PDA18.012.08.528,400211081487
      4TXCD010DS3S8V2D120M5PDA18.012.08.528,400211081497
      4TXCC009DS3S8V2C080M5PDA18.011.78.528,400211081493
      4PX*CU60BS3S8V2C100M5PDA18.011.78.528,600211081483
      4PX*DU48BS3S8V2D120M5PDA18.011.78.528,800211081486
      4PX*DU60BS3S9V2C100U5PSB+RP18.011.78.528,000207599971
      4TXCD010DS3*UD2D120ACV518.011.78.528,400207590811
      4PX*CU60BS3*UD2C080ACV418.011.78.528,600207590781
      4TXCC009DS3*UD2C080ACV418.011.78.528,600207590806
      4PX*DU60BS3*UD2D120ACV518.011.78.528,400207590784
      4TXCD010DS3L8V1C100U5VSA+RP18.012.08.527,400207590618
      4PX*DU60BS3S9V2D120U5VSA+RP18.012.08.528,600207590201
      4TXCD010DS3S9V2D120U5VSA+RP18.012.08.528,600207590208
      4PX*DU60BS3L8V1C100U5VSA+RP18.012.08.527,400207590616
      TEM8A0C48V41+TDR-18.012.08.528,600207590072
      4TXCD010DS3S9V2C100U5PSB+RP18.011.78.528,000207599980
      4PX*DU60BS3S8V2C080M5PCA18.011.78.527,400210692246
      4TXCD010DS3S8V2C080M5PCA18.011.78.527,400210692251
      4TXCD010DS3S8V2C100M5PCA18.011.78.527,600210692135
      4TXCC009DS3S8V2C100M5PCA18.011.78.528,600210692133
      4PX*DU60BS3S8V2C100M5PCA18.011.78.527,600210692126
      4PX*DU60BS3S8V2D120M5PCA18.012.08.528,400210692127
      4PX*CU60BS3S8V2C080M5PCA18.011.78.528,400210692121
      4TXCD010DS3S8V2D120M5PCA18.012.08.528,400210692136
      4TXCD008DS3S8V2D120M5PCA18.011.78.528,800210692134
      4PX*DU48BS3S8V2D120M5PCA18.011.78.528,800210692125
      4PX*CD60BS3S8V2C080M5PCA18.011.78.528,400210692115
      4PX*CD60BS3S8V2C100M5PCA18.011.78.528,600210692116
      4TXCC009DS3S8V2C080M5PCA18.011.78.528,400210692132
      4PX*CU60BS3S8V2C100M5PCA18.011.78.528,600210692122
      4PX*DU60BS3S9V2C100U4VSA+RP18.011.78.527,800207590202
      4TXCD010DS3S9V2C100U4VSA+RP18.011.78.527,800207590209
      4PX*BU48BS3+P0V0B000M40SC+RP-18.011.78.528,200211289114
      4TXCB006DS3+P0V0B000M40SC+RP-18.011.78.528,200211289115
      4PX*CU42BS3L8V1C100U5VSA+RP18.011.78.528,800210653179
      4PX*DU60BS3S9V2C080U5PSB+RP18.011.78.528,000210653197
      4TXCD010DS3S9V2C080U5PSB+RP18.011.78.528,000210653221
      4PX*CD60BS3S9V2C100D5PSB+RP18.011.78.528,800209449884
      4PX*DU60BS3S9V2D120U5PSB+RP18.012.08.528,600210653199
      4PX*DU48BS3S9V2D120U5PSB+RP18.011.78.529,000210653192
      4TXCD008DS3S9V2D120U5PSB+RP18.011.78.529,000210653218
      4TXCD010DS3S9V2D120U5PSB+RP18.012.08.528,600210653223
      4PX*DU48BS3S9V2D120U5VSA+RP18.011.78.529,000210653191
      Yearly running cost in 10 large cities$1,201-$3,198

      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 4A6V8X48A1?
      The American Standard 4A6V8X48A1 is rated at up to 18.0 SEER2 and 12.0 EER2 for cooling and up to 8.5 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with.
      Is the American Standard 4A6V8X48A1 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 4-ton model.
      How much does the American Standard 4A6V8X48A1 cost to run per year?
      At its rated efficiency it costs about $1,201-$3,198 a year in electricity in large U.S. cities, depending on climate and local rates - for example $1,478 in Phoenix and $2,671 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 4A6V8X48A1?
      ENERGY STAR lists 208 certified combinations for this outdoor unit. The highest-rated ones use 4PX*CU60BS3+P0V0C000M50SC+RP, 4PX*DU60BS3+P0V0C000M50SC+RP, 4PX*DU60BS3+P0V0D000M50SC+RP.
      What refrigerant does the American Standard 4A6V8X48A1 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 $1,466/yrYou save $857/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 4A6V8X48A1
      3. What it replaces
      4. Price replace the example with your quote
      Heat pump, per year
      $1,466
      Current system, per year
      $2,323
      You save per year
      $857
      Payback
      20.4 years
      Net after 10 years
      -$8,934

      Cooling $900Heating $567Electricity used: 9,163 kWhSaved vs. a minimum-efficiency heat pump: $308

      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 4 ton models

      See all 319 4 ton central heat pumps, ranked

      Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of July 9, 2025. How we use the data.