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      4-ton central heat pump · HRG18 SERIES

      Century HRG1860S1P

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

      Ranks #256 of 319 4 ton central heat pumps for cooling efficiency, and costs about $1,558 a year to run in a mixed climate like Atlanta.

      SEER2
      16.0 Cooling efficiency over a season
      Below average · beats 26%
      HSPF2
      7.8 Heating efficiency over a season
      Below average · beats 5%
      EER2
      11.7 Cooling efficiency on a 95°F day
      Average · beats 43%
      Heat at 5°F
      26,000 BTU/h56% of its 47°F output
      Below average · beats 25%

      A good fit if…

      • 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.
      • Cooling cost matters most - its SEER2 is below average for central heat pumps.
      • 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
      BrandCentury
      Also sold asComfort-Aire
      Outdoor unit modelHRG1860S1P
      SeriesHRG18 SERIES
      TypeCentral heat pump
      Nominal size4 ton
      CompressorVariable-speed units run longer at low powerContinuously variable
      RefrigerantR-410A
      Connected (smart) capableNo
      On the market sinceJuly 1, 2021
      Last certifiedJune 3, 2026
      Cooling
      SEER2Seasonal efficiency, higher is better16.0 (range 16.0)
      EER2Efficiency at 95°F outdoors11.7
      Cooling capacity46,500 BTU/h
      Heating
      HSPF2Seasonal efficiency, higher is better7.8
      Capacity at 47°F46,500 BTU/h
      Capacity at 17°F30,400 BTU/h
      Capacity at 5°F26,000 BTU/h
      COP at 5°F2.0 = twice as efficient as a space heater1.92
      ENERGY STAR cold climateNo
      Heating output as it gets colder56% kept at 5°F

      Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with EA(C,U)1P49C+H4TXV02 at the standard test temperatures, in BTU/h:

      Certified matchups4 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.
      EA(C,U)1P49C+H4TXV02GUH92C110C5M16.011.77.826,000207071586
      EA(C,U)1P49C+H4TXV02GUH92C110C5M16.011.77.826,000207071587
      EAC4X49CGUH92C110C5M16.011.77.826,000207071622
      EAC4X49CGUH92C110C5M16.011.77.826,000207071623
      Yearly running cost in 10 large cities$1,367-$3,744

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

      Questions5
      What is the SEER2 rating of the Century HRG1860S1P?
      The Century HRG1860S1P is rated at up to 16.0 SEER2 and 11.7 EER2 for cooling and up to 7.8 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with.
      Is the Century HRG1860S1P 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 Century HRG1860S1P cost to run per year?
      At its rated efficiency it costs about $1,367-$3,744 a year in electricity in large U.S. cities, depending on climate and local rates - for example $1,698 in Phoenix and $3,137 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 Century HRG1860S1P?
      ENERGY STAR lists 4 certified combinations for this outdoor unit. The highest-rated ones use EA(C,U)1P49C+H4TXV02, EAC4X49C.
      What refrigerant does the Century HRG1860S1P 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 $1,691/yrYou save $707/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 Century HRG1860S1P
      3. What it replaces
      4. Price replace the example with your quote
      Heat pump, per year
      $1,691
      Current system, per year
      $2,398
      You save per year
      $707
      Payback
      24.8 years
      Net after 10 years
      -$10,430

      Cooling $1,023Heating $668Electricity used: 10,567 kWhSaved vs. a minimum-efficiency heat pump: $148

      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 June 3, 2026. How we use the data.