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      4-ton central heat pump · IDS Edge

      Bosch BOHA-60RTB-M18S

      Very good cooling and heating efficiency for a 4-ton central heat pump, and certified for cold climates.

      Ranks #52 of 319 4 ton central heat pumps for cooling efficiency, and costs about $1,450 a year to run in a mixed climate like Atlanta.

      SEER2
      19.0 Cooling efficiency over a season
      Very good · beats 85%
      HSPF2
      9.8 Heating efficiency over a season
      Very good · beats 79%
      EER2
      9.5 Cooling efficiency on a 95°F day
      Below average · beats 5%
      Heat at 5°F
      42,000 BTU/h70% of its 47°F output
      Below average · beats 27%

      A good fit if…

      • You want low cooling bills - its SEER2 beats 85% of central heat pumps.
      • Your winters get properly cold - it is ENERGY STAR cold-climate certified, with 42,000 BTU/h at 5°F.
      • It will heat most of the year - its HSPF2 beats 79% 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

      Specifications4 ton, R-454B
      General
      BrandBosch
      Outdoor unit modelBOHA-60RTB-M18S
      SeriesIDS Edge
      TypeCentral heat pump
      Nominal size4 ton
      CompressorVariable-speed units run longer at low powerContinuously variable
      RefrigerantR-454B
      Connected (smart) capableNo
      On the market sinceJanuary 1, 2026
      Last certifiedApril 27, 2026
      Cooling
      SEER2Seasonal efficiency, higher is better19.0 (range 15.5-19.0)
      EER2Efficiency at 95°F outdoors9.0-10.2
      Cooling capacity43,000-60,000 BTU/h
      Heating
      HSPF2Seasonal efficiency, higher is better8.0-9.8
      Capacity at 47°F44,000-60,000 BTU/h
      Capacity at 17°F36,000-42,000 BTU/h
      Capacity at 5°F31,000-42,000 BTU/h
      COP at 5°F2.0 = twice as efficient as a space heater1.80-1.95
      ENERGY STAR cold climateYes
      Heating output as it gets colder70% 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-19.09.59.842,000218059680
      - BOSCH · cold climate-17.89.39.442,000218059681
      BIVA-48VCB-M18X · cold climate-17.010.29.039,000218032251
      BIVB-48RCB-M20X · cold climate-16.510.09.039,000218032249
      - BOSCH · cold climate-16.59.09.042,000218059678
      BIVB-48RCB-M20X · cold climate-16.510.09.039,000218160630
      BIVA-48RCB-M20X · cold climate-16.510.09.039,000218160622
      BIVA-60VCB-M18X · cold climate-16.59.58.542,000218032265
      BMAC4860DBTA · cold climateBGH97M120D5A15.59.58.637,000218032244
      BMAC4860DBTA · cold climateBGH97M100D5A15.59.58.640,000218032243
      BMAC4860CBTA · cold climateBGH97M100C5A15.59.58.637,000218032242
      BIVB-60RCB-M20X · cold climate-15.59.58.542,000218032250
      BIVB-60RCB-M20X · cold climate-15.59.58.542,000218160631
      BIVA-60RCB-M20X · cold climate-15.59.58.542,000218160623
      BMAC4248DBTA · cold climateBGH97M100D5A15.510.08.133,000218032239
      BMAC4248CBTA · cold climateBGH97M100C5A15.510.08.133,000218032237
      BMAC4248CBTA · cold climateBGH97M080C4A15.510.08.131,600218032236
      BMAC4248BBTA · cold climateBGH97M080B3A15.510.08.131,000218032234
      BMAC4248DBTA · cold climateBGH97M120D5A15.510.08.033,000218032240
      Yearly running cost in 10 large cities$1,287-$3,473

      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-60RTB-M18S?
      The Bosch BOHA-60RTB-M18S is rated at up to 19.0 SEER2 and 9.5 EER2 for cooling and up to 9.8 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 19 certified matchups SEER2 ranges from 15.5-19.0.
      Is the Bosch BOHA-60RTB-M18S good for cold climates?
      Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 42,000 BTU/h at 5°F with a COP of 1.95, so it is still 2.0 times as efficient as electric resistance heat at that temperature.
      How much does the Bosch BOHA-60RTB-M18S cost to run per year?
      At its rated efficiency it costs about $1,287-$3,473 a year in electricity in large U.S. cities, depending on climate and local rates - for example $1,591 in Phoenix and $2,905 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-60RTB-M18S?
      ENERGY STAR lists 19 certified combinations for this outdoor unit. The highest-rated ones use BIVA-48VCB-M18X, BIVB-48RCB-M20X, BIVA-48RCB-M20X.
      What refrigerant does the Bosch BOHA-60RTB-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 $1,581/yrYou save $1,133/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-60RTB-M18S
      3. What it replaces
      4. Price replace the example with your quote
      Heat pump, per year
      $1,581
      Current system, per year
      $2,714
      You save per year
      $1,133
      Payback
      17.2 years
      Net after 10 years
      -$8,165

      Cooling $963Heating $617Electricity used: 9,878 kWhSaved vs. a minimum-efficiency heat pump: $506

      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 April 27, 2026. How we use the data.