Bosch Thermotechnik
A Bosch Group heating, cooling, ventilation, hot-water and climate-technology business operating legally as Bosch Thermotechnik GmbH and using the Bosch Home Comfort Group name since 2023.
Last updated August 26, 2026
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Overview
Bosch Thermotechnik is the Bosch Group's heating and cooling technology business. The company operates legally as Bosch Thermotechnik GmbH and has used the Bosch Home Comfort Group name for its business activities since April 1, 2023. Based in Wetzlar, Germany, it supplies heating, ventilation, air-conditioning, refrigeration and hot-water technologies to residential, commercial and selected industrial customers. The business combines Bosch-branded offerings with established regional brands and acquired technology companies. Its portfolio includes gas-fired boilers, water heaters, heat pumps, solar-thermal systems, air-conditioning equipment, controls, ventilation solutions and related energy-management technologies. Products are sold through professional heating and plumbing channels as well as to business and private customers, with the exact brand and range varying by market. The organization's roots reach back to Bosch's acquisition of heating-appliance activities from Junkers & Co. in 1932. Over subsequent decades, Bosch expanded its presence through acquisitions and the development of production and distribution capabilities across Europe and North America. Important additions included the British Worcester business, French heating specialist e.l.m.leblanc, Portuguese water-heating manufacturer Vulcano, Swedish heat-pump producer IVT, U.S. geothermal heat-pump manufacturer FHP Manufacturing, and Buderus, whose long history in heating technology dates to the eighteenth century. The acquisition of Buderus in 2003 was particularly significant because Bosch subsequently combined the two companies' heating activities and created BBT Thermotechnik in 2004. The business has increasingly shifted its strategic emphasis toward electrification and lower-carbon heating. Heat pumps have become a major technology focus as energy-efficiency policy, decarbonization objectives and the Paris Agreement have encouraged alternatives to conventional fossil-fuel heating. Bosch has also invested in hydrogen-related heating research and in manufacturing capacity for heat-pump systems and components. In 2023, the company announced a planned investment of €225 million in a new heat-pump factory in Dobromierz, Poland, while also expanding component production in Portugal and Germany. In 2024, Bosch agreed to acquire Johnson Controls' global residential and light-commercial HVAC business. The transaction was intended to broaden Bosch's heating and cooling activities and was to be integrated into the Bosch Home Comfort Group. The move strengthened Bosch's position in climate-control equipment at a time when demand for cooling is increasing alongside global warming and when the heat-pump market is undergoing a difficult but strategically important transition. According to the cited company information, the Bosch Home Comfort Group generated €4.4 billion in revenue and employed approximately 13,800 people in the 2024 financial year. These figures describe the operating group and are time-specific rather than a separate public-company disclosure.
History
The history of Bosch Thermotechnik is rooted in Bosch's early expansion into heating appliances. In 1932, the former Robert Bosch AG acquired heating-appliance operations from Junkers & Co., creating the foundation for a business that would later become one of Europe's major heating-technology groups. In 1953, Junkers & Co. moved to Wernau and began manufacturing gas central-heating appliances together with control and safety equipment for gas systems. Bosch expanded through a series of regional acquisitions. It purchased a majority interest in the British Worcester Group in 1992. Founded in 1962, Worcester was a leading British combi-boiler business at the time and brought the Belgian heater manufacturer Radson into the Bosch-related structure. In 1996, Bosch acquired the French heating-technology company e.l.m.leblanc, strengthening its position in French gas boilers, gas water heaters and heating systems. In 1998, Bosch acquired Vulcano Termo-Domésticos in Portugal. Vulcano, founded in Aveiro in 1977, added water-heating development and production capabilities. A decisive change came in July 2003, when Bosch acquired Buderus AG. Buderus had a long history in heating technology dating back to 1731. Bosch subsequently merged the heating activities of Buderus and Bosch, and BBT Thermotechnik was established on August 2, 2004. The combination created one of Europe's largest heating-product manufacturers and gave the business a broader portfolio, manufacturing base and network of regional brands. The company continued to build capabilities in heat pumps and commercial heating. In 2006, it acquired IVT Holding AB, a Swedish heat-pump manufacturer founded in 1968. In 2007, it purchased FHP Manufacturing, a U.S. producer of geothermal electric heat pumps, to improve access to the American market. In 2009, Bosch Thermotechnik acquired Loos Deutschland GmbH, a boiler manufacturer based in Gunzenhausen, together with its foreign subsidiaries. During the following period, energy-efficiency regulation and climate policy increased interest in heat pumps and other lower-carbon systems. The business responded by investing in heat-pump technology, hydrogen-related heating research and manufacturing capacity. On April 1, 2023, Bosch Thermotechnik began using the Bosch Home Comfort Group name for its business activities, while continuing to operate legally as Bosch Thermotechnik GmbH. In 2023, Bosch announced a €225 million investment in a heat-pump factory in Dobromierz, Poland. It also began producing heat-pump components at facilities in Portugal and Eschenburg, Germany. In 2024, Bosch agreed to acquire Johnson Controls' global residential and light-commercial HVAC business, with the intention of incorporating those operations into the Bosch Home Comfort Group. The transaction broadened Bosch's exposure to air-conditioning and related climate-control markets. The business remains a subsidiary of Robert Bosch GmbH and serves residential and commercial customers in international markets.
- 2024
Johnson Controls HVAC acquisition agreed
[1]Bosch agreed to acquire Johnson Controls' global residential and light-commercial HVAC business for integration into Bosch Home Comfort.
- 2023
Bosch Home Comfort Group name introduced
[1]Bosch Thermotechnik began operating under the Bosch Home Comfort Group name on April 1.
- 2023
Heat-pump manufacturing investment announced
[1]Bosch announced a €225 million investment in a new heat-pump factory in Dobromierz, Poland.
- 2009
Acquisition of Loos Deutschland
[1]Bosch Thermotechnik acquired boiler manufacturer Loos Deutschland GmbH and its foreign subsidiaries.
- 2007
Acquisition of FHP Manufacturing
[1]Bosch purchased U.S. geothermal electric heat-pump manufacturer FHP Manufacturing.
- 2006
Acquisition of IVT
[1]Bosch acquired Swedish heat-pump manufacturer IVT Holding AB.
- 2004
BBT Thermotechnik is established
[1]Bosch and Buderus heating activities were combined, and BBT Thermotechnik was formally established on August 2.
- 2003
Bosch acquires Buderus
[1]Bosch acquired Buderus AG, a historically significant heating-technology company founded in 1731.
- 1998
Acquisition of Vulcano
[1]Bosch acquired Portuguese water-heating company Vulcano Termo-Domésticos.
- 1996
Acquisition of e.l.m.leblanc
[1]Bosch acquired French heating specialist e.l.m.leblanc to reinforce its position in French heating and water-heating markets.
Products and positioning
A technology-led, premium-to-upper-mainstream provider of integrated heating, cooling and hot-water solutions, with increasing emphasis on energy efficiency, electrification, heat pumps, digital controls and lower-carbon technologies.
Heating and cooling systems
Heat pumps
Heat pumps are a central strategic product area for Bosch Home Comfort. The portfolio includes systems intended to provide space heating and, depending on the configuration, cooling and domestic hot water. Bosch has expanded its heat-pump capabilities through the acquisitions of IVT and FHP Manufacturing and through investment in new production and component facilities. The technology supports the group's shift toward electrified and lower-carbon building comfort.
Residential and commercial heating
Gas-fired boilers
Gas boilers are part of the business's historical core and are marketed through Bosch and regional brands such as Buderus and Worcester Bosch. They serve residential and commercial heating applications and may be combined with hot-water equipment, controls and other system components. The business continues to manage this established product category while investing in heat pumps and other lower-carbon technologies.
Water heating
Hot-water heaters
Bosch Home Comfort supplies water-heating products for household and commercial use. The category reflects the capabilities added through the Vulcano acquisition and includes technologies associated with Bosch's broader heating-system portfolio. Product availability and branding differ by country and distribution channel.
Cooling and climate control
Air-conditioning systems
Air-conditioning and cooling systems extend the business beyond traditional heating. They address residential and light-commercial climate-control needs and became an even more important strategic area following Bosch's agreement to acquire Johnson Controls' global residential and light-commercial HVAC operations in 2024.
Renewable heating
Solar-thermal systems
Solar-thermal systems use solar energy to support hot-water production and heating. They form part of the company's wider energy-efficiency and renewable-heating offering and can be integrated with other heating technologies.
Controls and energy management
Heating controls and connected systems
Controls, regulation equipment and connected system components help users manage heating and cooling performance, comfort and energy consumption. This category continues the company's historical involvement in gas-appliance controls and supports integrated Bosch home-comfort solutions.
Brand decisions
2024
Acquire Johnson Controls residential and light-commercial HVAC operationsM&ABackground
Bosch sought to expand its international HVAC position as demand for cooling increased and the long-term market shifted toward more efficient climate technologies.
Action taken
Bosch agreed to acquire Johnson Controls' global residential and light-commercial HVAC business and planned to integrate it into the Bosch Home Comfort Group.
Aftermath
The transaction was expected to broaden Bosch's cooling and climate-control portfolio and strengthen its international home-comfort platform. The cited material does not provide a verified purchase price.
2023
Expand heat-pump manufacturing capacityStrategyBackground
Decarbonization policy and rising interest in electrified heating increased the strategic importance of heat pumps.
Action taken
Bosch announced a €225 million investment in a heat-pump factory in Dobromierz, Poland, and expanded component production in Portugal and Germany.
Aftermath
The investment increased the group's planned manufacturing footprint for heat-pump technology and reinforced its transition toward lower-carbon heating.
Announced investment. €225 million planned investment (2023 announcement)
2004
Combine Bosch and Buderus heating activitiesM&ABackground
Following Bosch's acquisition of Buderus in 2003, the group needed to consolidate two substantial heating-technology businesses.
Action taken
Bosch merged the relevant heating activities and established BBT Thermotechnik on August 2, 2004.
Aftermath
The combined organization became one of Europe's largest heating-product manufacturers and provided a broader platform for later acquisitions and product development.
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