HVAC Rated
    Menu

      2-ton central heat pump · IDS Light-LGWP

      Bosch BOVB-24RTB-M15S

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

      Ranks #166 of 331 2 ton central heat pumps for cooling efficiency, and costs about $703 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 - 26 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 modelBOVB-24RTB-M15S
      SeriesIDS Light-LGWP
      TypeCentral heat pump
      Nominal size2 ton
      CompressorVariable-speed units run longer at low powerContinuously variable
      RefrigerantR-454B
      Connected (smart) capableYes
      On the market sinceOctober 1, 2025
      Last certifiedSeptember 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 matchups26 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-18.011.78.517,200217895372
      BIVB-24RCB-M20X · cold climate-18.011.78.517,200217895354
      BIWA-18RXB-M16X · cold climate-16.011.79.012,800217895303
      BICA-18RXB-M16X · cold climate-16.011.79.012,900217895305
      BMAC2430ABTA · cold climateBGH96M080B3C16.010.68.516,800217895258
      BMAC2430BBTA · cold climateBGH96M060B3C16.010.68.516,800217895259
      BMAC2430BBTA · cold climateBGH96M080B3C16.010.68.516,800217895260
      BMAC3036BBTA · cold climateBGH96M080B3C16.010.68.516,800217895267
      BMAC2430ABTA · cold climateBGH97M060B3A16.010.68.516,800217895297
      BMAC2430ABTA · cold climateBGH97M080B3A16.010.68.516,800217895298
      BMAC2430BBTA · cold climateBGH97M060B3A16.010.68.516,800217895299
      BMAC2430BBTA · cold climateBGH97M080B3A16.010.68.516,800217895300
      BICA-24RXB-M16X · cold climate-16.011.78.516,700217895306
      BMAC3036BBTA · cold climateBGH97M060B3A16.010.68.516,800217895309
      BMAC3036BBTA · cold climateBGH97M080B3A16.010.68.516,800217895310
      BMAC2430ABTA+BMXFACTA · cold climate-16.010.68.516,800217895407
      BMAC3036BBTA+BMXFBCTA · cold climate-16.010.68.516,800217895409
      BMAC2430ABTA · cold climateBGH96M060B3C16.010.68.516,800217895257
      BMAC3036BBTA · cold climateBGH96M060B3C16.010.68.516,800217895266
      BMAC2430BBTA+BMXFBCTA · cold climate-16.010.68.516,800217895408
      BMAC2430BBTA · cold climateBGK80A080B3A16.010.68.516,800218787868
      BMAC3036BBTA · cold climateBGK80A080B3A16.010.68.516,800218787867
      BMAC3036BBTA · cold climateBGK80A060A3A16.010.68.516,800218787866
      BMAC2430ABTA · cold climateBGK80A060A3A16.010.68.516,800218787865
      BIWA-24RXB-M16X · cold climate-15.210.59.016,800217895304
      BIVA-24RXB-M15X · cold climate-15.210.68.517,000217895296
      Yearly running cost in 10 large cities$627-$1,683

      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 BOVB-24RTB-M15S?
      The Bosch BOVB-24RTB-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 26 certified matchups SEER2 ranges from 15.2-18.0.
      Is the Bosch BOVB-24RTB-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 BOVB-24RTB-M15S cost to run per year?
      At its rated efficiency it costs about $627-$1,683 a year in electricity in large U.S. cities, depending on climate and local rates - for example $774 in Phoenix and $1,407 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 BOVB-24RTB-M15S?
      ENERGY STAR lists 26 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 BOVB-24RTB-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 $768/yrYou save $470/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 BOVB-24RTB-M15S
      3. What it replaces
      4. Price replace the example with your quote
      Heat pump, per year
      $768
      Current system, per year
      $1,238
      You save per year
      $470
      Payback
      19.2 years
      Net after 10 years
      -$4,305

      Cooling $469Heating $299Electricity used: 4,800 kWhSaved vs. a minimum-efficiency heat pump: $181

      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 September 22, 2026. How we use the data.