Bosch Thermotechnik GmbH

About the Bosch Home Comfort Group

The Bosch Home Comfort Group, legally Bosch Thermotechnik GmbH headquartered in Wetzlar, is a provider of heating, ventilation and air conditioning technology as well as solutions for hot water and process heat. The company belongs to Robert Bosch GmbH and goes back to the former Bosch Thermotechnik, which was renamed on 1 April 2023. The portfolio includes heat pumps and heat pump hybrid solutions, water heaters, air conditioning systems, ventilation, air purifiers, dehumidifiers, energy management and smart home as well as steam and heating boilers for commercial and industrial applications and combined heat and power units. In 2023, the first air-to-water heat pump using the refrigerant propane was presented and an investment of €225 million in a new heat pump factory in Dobromierz (Poland) was announced. In August 2025, the acquisition of the HVAC business for residential and light commercial buildings from Johnson Controls was completed; since then the group comprises more than 50 locations and around 24,000 employees with revenue of around €4.4 billion (fiscal year 2024/2025).

Site

Wetzlar

Processes

Energy management, Smart Home

Employees

around 24,000

Industries

Heating, ventilation and air conditioning (HVAC), Commercial and industrial boiler technology, Process heat, Construction, Public institutions, Energy suppliers

1. 01

   Engineering and product development

2. 02

   Component manufacturing

3. 03

   Assembly

4. 04

   Quality inspection

5. 05

   Sales and service

Locations

Inside the production

History

1. 1932

   Bosch acquires the heating appliance activities of Junkers & Co. – entry into the heating appliance market

2. 1953

   Junkers & Co. relocates to Wernau; manufacturing of gas central heating systems

3. 1975

   First heat pump prototype under the Junkers brand

4. 1980

   Presentation of a hot water heat pump

5. 1988

   Acquisition of the Portuguese manufacturer Vulcano Termo-Domésticos (Aveiro)

6. 1992

   Acquisition of the majority stake in the British Worcester Group plc. as well as Radson (Belgium)

7. 1995

   Creation of the Thermotechnology division

8. 1996

   Acquisition of the French manufacturer e.l.m.leblanc

9. 2003

   Acquisition of Buderus AG (founded 1731)

10. 2004

    Foundation of BBT Thermotechnik GmbH (2 August); acquisition of the Swedish heat pump manufacturer IVT

11. 2007

    Acquisition of FHP Manufacturing (USA, geothermal heat pumps)

12. 2009

    Acquisition of Loos Deutschland GmbH respectively Bosch Industriekessel GmbH (industrial boilers)

13. 2010/2011

    Acquisition of Köhler & Ziegler Anlagentechnik GmbH (CHP 20–2,000 kW, ORC); 2011 renaming to Bosch KWK Systeme GmbH

14. 2023

    Renaming to Bosch Home Comfort Group (1 April); investment of €225 million in heat pump factory Dobromierz (PL); first air-to-water heat pump with propane as refrigerant

15. 2024

    Stiftung Warentest test winner (Buderus Logatherm WLW186i-10 AR E); announcement of the acquisition of the Johnson Controls HVAC business for approximately €7.4 billion

16. 2025

    Completion of the Johnson Controls acquisition: more than 50 locations, over 24,000 employees, revenue around €4.4 billion