HVAC Rated
    Menu

      2-ton central heat pump · DRU Series

      DuraSTAR DRU1U24S2A

      Very good cooling efficiency and excellent heating efficiency for a 2-ton central heat pump, and certified for cold climates.

      Ranks #110 of 331 2 ton central heat pumps for cooling efficiency, and costs about $654 a year to run in a mixed climate like Atlanta.

      SEER2
      18.4 Cooling efficiency over a season
      Very good · beats 75%
      HSPF2
      10.4 Heating efficiency over a season
      Excellent · beats 94%
      EER2
      10.8 Cooling efficiency on a 95°F day
      Below average · beats 19%
      Heat at 5°F
      21,600 BTU/h84% of its 47°F output
      Below average · beats 29%

      A good fit if…

      • You want low cooling bills - its SEER2 beats 75% of central heat pumps.
      • Your winters get properly cold - it is ENERGY STAR cold-climate certified, with 21,600 BTU/h at 5°F.
      • It will heat most of the year - its HSPF2 beats 94% of central heat pumps.
      • You want steady temperatures and quiet running - the compressor varies its speed.

      Think twice if…

      • Nothing stands out - its ratings have no weak spot for its class.

      Calculate my running cost

      Details

      Specifications2 ton, R-454B
      General
      BrandDuraSTAR
      Outdoor unit modelDRU1U24S2A
      SeriesDRU Series
      TypeCentral heat pump
      Nominal size2 ton
      CompressorVariable-speed units run longer at low powerContinuously variable
      RefrigerantR-454B
      Connected (smart) capableNo
      On the market sinceDecember 8, 2020
      Last certifiedMay 1, 2026
      Cooling
      SEER2Seasonal efficiency, higher is better18.4 (range 15.2-18.4)
      EER2Efficiency at 95°F outdoors10.0-11.0
      Cooling capacity24,000 BTU/h
      Heating
      HSPF2Seasonal efficiency, higher is better8.5-10.4
      Capacity at 47°F24,000-26,000 BTU/h
      Capacity at 17°F18,000-20,800 BTU/h
      Capacity at 5°F19,000-21,600 BTU/h
      COP at 5°F2.0 = twice as efficient as a space heater1.75-1.96
      ENERGY STAR cold climateYes
      Heating output as it gets colder84% kept at 5°F

      Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with DRUC2417S2A at the standard test temperatures, in BTU/h:

      Certified matchups53 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.
      DRUC2417S2A · cold climateRG19080B12MPS118.410.89.921,000218072058
      DRUM1824S2A · cold climate-18.111.09.721,600215374893
      DRUC2417S2A · cold climateMGV96U060B3C17.810.89.220,000218071728
      DRUC2414S2A · cold climateRL18060A12MPS117.710.59.421,000218072107
      DRUC2414S2A · cold climateGR9T960403AN17.610.39.121,000218072374
      DRUC2417S2A · cold climateMGV96U080B3C17.610.79.120,000218071729
      DRUC2414S2A · cold climateRG19040A10MPS117.510.18.820,000218072056
      DRUF2420S2A · cold climate-17.410.810.419,600217285076
      DRUC2414S2A · cold climateGR9T960303AN17.410.29.221,000218072373
      DRUC2417S2A · cold climateS9V2B060D3VS***17.210.58.520,000218071706
      DRUC2417S2A · cold climateS9V2B060U4VS***17.210.58.520,000218071705
      DRUC2417S2A · cold climateS9V2B040U3VS***17.210.58.520,000218071704
      DRUC2417S2A · cold climateRL18080B12MPS117.110.99.320,000218072108
      DRUC2414S2A · cold climateGR9S920403AN17.110.39.120,000218072367
      DRUC2417S2A · cold climateS9V2B080D4VS***17.110.59.120,000218071927
      DRUC2417S2A · cold climateS9V2B040D3VS***17.110.49.020,000218071926
      DRUC2417S2A · cold climateGD9S960603BN17.010.39.320,000218072379
      DRUC2417S2A · cold climateML193DF070XE36B*17.010.49.120,000218072357
      DRUC2414S2A · cold climateRL18040A12MPS116.910.69.220,000218072106
      DRUC2417S2A · cold climateML193DF045XE36B*16.910.49.020,000218072356
      DRUC2417S2A · cold climateS9X2B040D3PSB**16.810.39.020,000218071996
      DRUC2417S2A · cold climateS9X1B040D3PSB**16.810.39.020,000218071928
      DRUC2417S2A · cold climateRG19060B12MPS116.710.69.621,000218072010
      DRUC2414S2A · cold climateRG19060A10MPS116.710.19.321,000218072057
      DRUC2417S2A · cold climateML296UH070XV36B*16.710.29.220,000218072366
      DRUC2417S2A · cold climateMGV80M080B4A16.710.49.220,000218071805
      DRUC2417S2A · cold climateML296UH045XV36B*16.610.19.020,000218072365
      DRUC2417S2A · cold climateML193UH070XE36B*16.610.38.920,000218072360
      DRUC2417S2A · cold climateML193UH030XE36B*16.610.38.920,000218072358
      DRUC2414S2A · cold climateGR9T960603AN16.510.39.221,000218072375
      DRUC2417S2A · cold climateMGV80M060B4A16.510.39.120,000218071804
      DRUC2417S2A · cold climateS9X2B040U3PSB**16.410.49.120,000218071997
      DRUC2417S2A · cold climateS9X1B040U3PSB**16.410.49.120,000218071929
      DRUC2417S2A · cold climateML296DF045XV36B*16.310.09.120,000218072364
      DRUC2414S2A · cold climateMGV80M060A3A16.310.29.120,000218071803
      DRUC2417S2A · cold climateGR9S920603BN16.210.49.320,000218072368
      DRUC2414S2A · cold climateGR9S960403AN16.210.29.121,000218072370
      DRUC2417S2A · cold climateML196UH045XE36B*16.210.39.120,000218072362
      DRUC2417S2A · cold climateGD9T960603BN16.110.39.320,000218072381
      DRUC2417S2A · cold climateGR9T960803BN16.010.39.220,000218072377
      DRUC2414S2A · cold climate-16.010.09.019,000217493418
      DRUC2417S2A · cold climate-16.010.09.019,000217493419
      DRUC2417S2A · cold climateML196UH070XE36B*16.010.49.020,000218072363
      DRUC2414S2A · cold climateMGV80M040A3A16.010.08.920,000218071802
      DRUC2417S2A · cold climateGD9T960803BN15.910.29.320,000218072382
      DRUC2417S2A · cold climateGR9S960803BN15.910.39.320,000218072372
      DRUC2417S2A · cold climateGR9S920803BN15.910.39.320,000218072369
      DRUC2417S2A · cold climateGR9S960603BN15.910.39.220,000218072371
      DRUC2417S2A · cold climateML193UH045XE36B*15.910.39.120,000218072359
      DRUC2417S2A · cold climateGD9T960403BN15.810.29.220,000218072380
      DRUC2417S2A · cold climateGD9S960403BN15.810.29.220,000218072378
      DRUC2417S2A · cold climateGR9T960603BN15.810.39.220,000218072376
      DRUC2417S2A · cold climateML196DF070XE48B*15.210.28.820,000218072361
      Yearly running cost in 10 large cities$611-$1,542

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

      Questions5
      What is the SEER2 rating of the DuraSTAR DRU1U24S2A?
      The DuraSTAR DRU1U24S2A is rated at up to 18.4 SEER2 and 10.8 EER2 for cooling and up to 10.4 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 53 certified matchups SEER2 ranges from 15.2-18.4.
      Is the DuraSTAR DRU1U24S2A good for cold climates?
      Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 21,600 BTU/h at 5°F with a COP of 1.96, so it is still 2.0 times as efficient as electric resistance heat at that temperature.
      How much does the DuraSTAR DRU1U24S2A cost to run per year?
      At its rated efficiency it costs about $611-$1,542 a year in electricity in large U.S. cities, depending on climate and local rates - for example $741 in Phoenix and $1,278 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 DuraSTAR DRU1U24S2A?
      ENERGY STAR lists 53 certified combinations for this outdoor unit. The highest-rated ones use DRUC2417S2A, DRUM1824S2A, DRUC2414S2A.
      What refrigerant does the DuraSTAR DRU1U24S2A 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 $728/yrYou save $526/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 DuraSTAR DRU1U24S2A
      3. What it replaces
      4. Price replace the example with your quote
      Heat pump, per year
      $728
      Current system, per year
      $1,254
      You save per year
      $526
      Payback
      17.1 years
      Net after 10 years
      -$3,745

      Cooling $459Heating $269Electricity used: 4,552 kWhSaved vs. a minimum-efficiency heat pump: $236

      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 1, 2026. How we use the data.