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      3-ton central heat pump · IDS Edge

      Bosch BOHA-36MTB-M18S

      Excellent cooling and heating efficiency for a 3-ton central heat pump, and certified for cold climates.

      Ranks #26 of 302 3 ton central heat pumps for cooling efficiency, and costs about $924 a year to run in a mixed climate like Atlanta.

      SEER2
      20.0 Cooling efficiency over a season
      Excellent · beats 94%
      HSPF2
      10.1 Heating efficiency over a season
      Excellent · beats 90%
      EER2
      13.3 Cooling efficiency on a 95°F day
      Excellent · beats 93%
      Heat at 5°F
      36,000 BTU/h85% of its 47°F output
      Below average · beats 39%

      A good fit if…

      • You want low cooling bills - its SEER2 beats 94% of central heat pumps.
      • Your winters get properly cold - it is ENERGY STAR cold-climate certified, with 36,000 BTU/h at 5°F.
      • It will heat most of the year - its HSPF2 beats 90% 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

      Specifications3 ton, R-454B
      General
      BrandBosch
      Outdoor unit modelBOHA-36MTB-M18S
      SeriesIDS Edge
      TypeCentral heat pump
      Nominal size3 ton
      CompressorVariable-speed units run longer at low powerContinuously variable
      RefrigerantR-454B
      Connected (smart) capableNo
      On the market sinceJanuary 1, 2026
      Last certifiedJune 29, 2026
      Cooling
      SEER2Seasonal efficiency, higher is better20.0 (range 15.7-20.0)
      EER2Efficiency at 95°F outdoors9.7-13.3
      Cooling capacity32,600-36,000 BTU/h
      Heating
      HSPF2Seasonal efficiency, higher is better8.1-10.1
      Capacity at 47°F34,200-40,000 BTU/h
      Capacity at 17°F27,800-31,200 BTU/h
      Capacity at 5°F32,000-36,000 BTU/h
      COP at 5°F2.0 = twice as efficient as a space heater1.85-2.00
      ENERGY STAR cold climateYes
      Heating output as it gets colder85% kept at 5°F

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

      Certified matchups19 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.
      - BOSCH · cold climate-20.013.310.134,000218043836
      - BOSCH · cold climate-18.912.79.934,000218043837
      - BOSCH · cold climate-17.812.09.634,000218043835
      BIVB-36RCB-M20X · cold climate-17.211.79.436,000218032212
      BIVB-36RCB-M20X · cold climate-17.211.79.436,000218160625
      BIVA-36RCB-M20X · cold climate-17.211.79.436,000218160617
      BIVA-36VCB-M18X · cold climate-17.011.79.436,000218032219
      BMAC4248BBTA+BMXFBCTA · cold climate-17.010.68.732,000218470800
      BMAC3036BBTA+BMXFBCTA · cold climate-16.310.08.232,000218470802
      BMAC3036BBTA · cold climateBGH97M080B3A16.010.28.936,000218032192
      BMAC4248CBTA · cold climateBGH97M100C5A16.010.58.536,000218032198
      BMAC4248BBTA · cold climateBGH97M080B3A16.010.58.536,000218032197
      BMAC3036CBTA · cold climateBGH97M100C5A16.010.58.536,000218032195
      BMAC3036CBTA · cold climateBGH97M080C4A16.010.28.536,000218032194
      BMAC3036BBTA · cold climateBGH97M060B3A16.010.28.534,200218032191
      BMAC3036ABTA · cold climateBGH97M080B3A16.010.28.534,200218032189
      BMAC3036ABTA · cold climateBGH97M060B3A16.010.28.534,200218032187
      BMAC3036ABTA+BMXFACTA · cold climate-16.09.78.132,000218470803
      BMAC4248CBTA+BMXFCCTA · cold climate-15.710.78.732,000218470799
      Yearly running cost in 10 large cities$800-$2,229

      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 BOHA-36MTB-M18S?
      The Bosch BOHA-36MTB-M18S is rated at up to 20.0 SEER2 and 13.3 EER2 for cooling and up to 10.1 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 19 certified matchups SEER2 ranges from 15.7-20.0.
      Is the Bosch BOHA-36MTB-M18S good for cold climates?
      Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 36,000 BTU/h at 5°F with a COP of 2.00, so it is still 2.0 times as efficient as electric resistance heat at that temperature.
      How much does the Bosch BOHA-36MTB-M18S cost to run per year?
      At its rated efficiency it costs about $800-$2,229 a year in electricity in large U.S. cities, depending on climate and local rates - for example $999 in Phoenix and $1,872 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 BOHA-36MTB-M18S?
      ENERGY STAR lists 19 certified combinations for this outdoor unit. The highest-rated ones use BIVB-36RCB-M20X, BIVA-36RCB-M20X, BIVA-36VCB-M18X.
      What refrigerant does the Bosch BOHA-36MTB-M18S 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 $998/yrYou save $788/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 BOHA-36MTB-M18S
      3. What it replaces
      4. Price replace the example with your quote
      Heat pump, per year
      $998
      Current system, per year
      $1,786
      You save per year
      $788
      Payback
      16.5 years
      Net after 10 years
      -$5,118

      Cooling $598Heating $399Electricity used: 6,235 kWhSaved vs. a minimum-efficiency heat pump: $377

      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 3 ton models

      See all 302 3 ton central heat pumps, ranked

      Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of June 29, 2026. How we use the data.