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      4-ton central heat pump · F Series

      Fujitsu FOP1948MJAYCA

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

      Ranks #41 of 319 4 ton central heat pumps for cooling efficiency, and costs about $1,223 a year to run in a mixed climate like Atlanta.

      SEER2
      19.0 Cooling efficiency over a season
      Very good · beats 85%
      HSPF2
      10.0 Heating efficiency over a season
      Very good · beats 84%
      EER2
      12.0 Cooling efficiency on a 95°F day
      Average · beats 64%
      Heat at 5°F
      42,000 BTU/h92% of its 47°F output
      Average · beats 58%

      A good fit if…

      • You want low cooling bills - its SEER2 beats 85% of central heat pumps.
      • It will heat most of the year - its HSPF2 beats 84% 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.

      Calculate my running cost

      Details

      Specifications4 ton, R-454B
      General
      BrandFujitsu
      Outdoor unit modelFOP1948MJAYCA
      SeriesF Series
      TypeCentral heat pump
      Nominal size4 ton
      CompressorVariable-speed units run longer at low powerContinuously variable
      RefrigerantR-454B
      Connected (smart) capableNo
      On the market sinceSeptember 12, 2024
      Last certifiedJune 12, 2026
      Cooling
      SEER2Seasonal efficiency, higher is better19.0 (range 19.0)
      EER2Efficiency at 95°F outdoors12.0
      Cooling capacity45,500 BTU/h
      Heating
      HSPF2Seasonal efficiency, higher is better10.0
      Capacity at 47°F45,500 BTU/h
      Capacity at 17°F42,000 BTU/h
      Capacity at 5°F42,000 BTU/h
      COP at 5°F2.0 = twice as efficient as a space heater2.10
      ENERGY STAR cold climateNo
      Heating output as it gets colder92% kept at 5°F

      Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with FHRAVM4821S*YECA at the standard test temperatures, in BTU/h:

      Certified matchups1 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.
      FHRAVM4821S*YECA19.012.010.042,000215611121
      Yearly running cost in 10 large cities$1,124-$2,900

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

      Questions5
      What is the SEER2 rating of the Fujitsu FOP1948MJAYCA?
      The Fujitsu FOP1948MJAYCA is rated at up to 19.0 SEER2 and 12.0 EER2 for cooling and up to 10.0 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with.
      Is the Fujitsu FOP1948MJAYCA 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 Fujitsu FOP1948MJAYCA cost to run per year?
      At its rated efficiency it costs about $1,124-$2,900 a year in electricity in large U.S. cities, depending on climate and local rates - for example $1,371 in Phoenix and $2,412 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 Fujitsu FOP1948MJAYCA?
      ENERGY STAR lists 1 certified combination for this outdoor unit. The highest-rated one uses FHRAVM4821S*YECA.
      What refrigerant does the Fujitsu FOP1948MJAYCA use?
      It uses R-454B.

      Running cost and savings

      Pre-filled with this model. Pick your city and what you heat with today; everything else is optional.

      Heat pump $1,353/yrYou save $994/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 Fujitsu FOP1948MJAYCA
      3. What it replaces
      4. Price replace the example with your quote
      Heat pump, per year
      $1,353
      Current system, per year
      $2,346
      You save per year
      $994
      Payback
      17.1 years
      Net after 10 years
      -$7,065

      Cooling $843Heating $510Electricity used: 8,453 kWhSaved vs. a minimum-efficiency heat pump: $447

      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 June 12, 2026. How we use the data.