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      2-ton central heat pump · IDS Light-LGWP

      Bosch BOVA-24RXB-M15S

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

      Ranks #165 of 331 2 ton central heat pumps for cooling efficiency, and costs about $699 a year to run in a mixed climate like Atlanta.

      SEER2
      18.0 Cooling efficiency over a season
      Average · beats 66%
      HSPF2
      9.0 Heating efficiency over a season
      Average · beats 54%
      EER2
      11.7 Cooling efficiency on a 95°F day
      Average · beats 43%
      Heat at 5°F
      17,200 BTU/h72% of its 47°F output
      Below average · beats 9%

      A good fit if…

      • Your winters get properly cold - it is ENERGY STAR cold-climate certified, with 17,200 BTU/h at 5°F.
      • You want steady temperatures and quiet running - the compressor varies its speed.
      • You want a choice of indoor units - 20 certified pairings.

      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
      BrandBosch
      Outdoor unit modelBOVA-24RXB-M15S
      SeriesIDS Light-LGWP
      TypeCentral heat pump
      Nominal size2 ton
      CompressorVariable-speed units run longer at low powerContinuously variable
      RefrigerantR-454B
      Connected (smart) capableNo
      On the market sinceJuly 16, 2024
      Last certifiedApril 22, 2026
      Cooling
      SEER2Seasonal efficiency, higher is better18.0 (range 15.2-18.0)
      EER2Efficiency at 95°F outdoors10.5-11.7
      Cooling capacity18,000-24,000 BTU/h
      Heating
      HSPF2Seasonal efficiency, higher is better8.5-9.0
      Capacity at 47°F18,000-24,000 BTU/h
      Capacity at 17°F14,800-20,200 BTU/h
      Capacity at 5°F12,800-17,200 BTU/h
      COP at 5°F2.0 = twice as efficient as a space heater1.80-1.84
      ENERGY STAR cold climateYes
      Heating output as it gets colder72% kept at 5°F

      Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with BIVA-24RCB-M20X at the standard test temperatures, in BTU/h:

      Certified matchups20 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.
      BIVA-24RCB-M20X · cold climate-18.011.78.517,200215225087
      BIVB-24RCB-M20X · cold climate-18.011.78.517,200217895207
      BIWA-18RXB-M16X · cold climate-16.011.79.012,800216618891
      BICA-18RXB-M16X · cold climate-16.011.79.012,900216618893
      BMAC2430ABTA · cold climateBGH96M060B3C16.010.68.516,800215225089
      BMAC2430ABTA · cold climateBGH96M080B3C16.010.68.516,800215225090
      BMAC2430BBTA · cold climateBGH96M060B3C16.010.68.516,800215225091
      BMAC2430BBTA · cold climateBGH96M080B3C16.010.68.516,800215225092
      BICA-24RXB-M16X · cold climate-16.011.78.516,700216618894
      BMAC2430ABTA · cold climateBGH97M060B3A16.010.68.516,800217895212
      BMAC2430ABTA · cold climateBGH97M080B3A16.010.68.516,800217895213
      BMAC2430BBTA · cold climateBGH97M060B3A16.010.68.516,800217895214
      BMAC2430BBTA · cold climateBGH97M080B3A16.010.68.516,800217895215
      BMAC3036BBTA · cold climateBGH97M060B3A16.010.68.516,800217895221
      BMAC3036BBTA · cold climateBGH97M080B3A16.010.68.516,800217895222
      BMAC2430ABTA+BMXFACTA · cold climate-16.010.68.516,800217895389
      BMAC3036BBTA+BMXFBCTA · cold climate-16.010.68.516,800217895391
      BMAC2430BBTA+BMXFBCTA · cold climate-16.010.68.516,800217895390
      BIWA-24RXB-M16X · cold climate-15.210.59.016,800216618892
      BIVA-24RXB-M15X · cold climate-15.210.68.517,000215225088
      Yearly running cost in 10 large cities$617-$1,677

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

      Questions5
      What is the SEER2 rating of the Bosch BOVA-24RXB-M15S?
      The Bosch BOVA-24RXB-M15S is rated at up to 18.0 SEER2 and 11.7 EER2 for cooling and up to 9.0 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 20 certified matchups SEER2 ranges from 15.2-18.0.
      Is the Bosch BOVA-24RXB-M15S good for cold climates?
      Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 17,200 BTU/h at 5°F with a COP of 1.84, so it is still 1.8 times as efficient as electric resistance heat at that temperature.
      How much does the Bosch BOVA-24RXB-M15S cost to run per year?
      At its rated efficiency it costs about $617-$1,677 a year in electricity in large U.S. cities, depending on climate and local rates - for example $764 in Phoenix and $1,404 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 Bosch BOVA-24RXB-M15S?
      ENERGY STAR lists 20 certified combinations for this outdoor unit. The highest-rated ones use BIVA-24RCB-M20X, BIVB-24RCB-M20X, BIWA-18RXB-M16X.
      What refrigerant does the Bosch BOVA-24RXB-M15S 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 $760/yrYou save $463/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 Bosch BOVA-24RXB-M15S
      3. What it replaces
      4. Price replace the example with your quote
      Heat pump, per year
      $760
      Current system, per year
      $1,223
      You save per year
      $463
      Payback
      19.4 years
      Net after 10 years
      -$4,368

      Cooling $462Heating $299Electricity used: 4,751 kWhSaved vs. a minimum-efficiency heat pump: $179

      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 April 22, 2026. How we use the data.