
Planning, implementation and service of refrigeration and air conditioning systems as well as heat pumps from 1 kW to 2,000 kW.

KÄLTE-KLIMA GmbH Bertuleit & Müller
31785 Hameln · 37154 Northeim · 33649 Bielefeld · 01259 Dresden · 06792 Sandersdorf-Brehna · 85609 AschheimNew on Amplifa
About the KÄLTE-KLIMA Group
The KÄLTE-KLIMA Group, headquartered in Hameln, was founded in 1979 as the engineering office Bertuleit & Bökenkröger GmbH and today comprises six subsidiaries at six locations in Germany. With around 250 employees, the company plans, develops and implements refrigeration systems for industry, commerce and supermarkets, air conditioning systems among other things for retail, as well as heat pumps and special units in a power range from 1 kW to 2,000 kW. Around 600 projects are implemented annually and approximately 1,000 new refrigeration and air conditioning systems are built; more than 2,000 regular customers are served with over 40,000 installed systems. The service offering includes maintenance, a 24-hour emergency service and leak testing. Major customers are served nationwide through the joint venture temtec Kälte-Klima GmbH. Industry focal points are food supply and retail, healthcare, research as well as commerce and industry.
- Site
- Hameln
- Processes
- Refrigeration technology for industry and commerce, Supermarket refrigeration, Air conditioning systems (shop air conditioning), Heat pumps, Leak testing, Maintenance and service (around the clock / emergency service), Planning, development and implementation of refrigeration and air conditioning systems, special, Refrigeration technology (industry, commerce, supermarkets)
- Materials
- Industrial and commercial refrigeration technology, Supermarket refrigeration technology, Air conditioning systems / VRF systems, Heat pumps, Leak testing, Maintenance and 24h emergency service
- Certificates
- Leak testing
- Founded
- 1979
- Employees
- approx. 250
- Industries
- Food supply / retail, Healthcare / medical care, Research and services, Commerce and industry, Food supply/retail, Healthcare/medical care
- 01
Consulting and planning
- 02
Engineering and special unit manufacturing
- 03
Installation and commissioning
- 04
Maintenance, 24h emergency service and leak testing
Areas of expertise and processes
Industrial and commercial refrigeration technology
Planning and implementation of refrigeration systems for industrial and commercial customers from 1 to 2,000 kW.
Supermarket refrigeration technology
Refrigeration technology for daily food supply in the supermarket sector.
Air conditioning systems / VRF systems
Air conditioning of, among other things, shops, furniture stores and commercial spaces.
Heat pumps
Heat pumps for heating residential and commercial buildings.
Leak testing
Regular leak testing of refrigeration and air conditioning systems in accordance with legal requirements.
Maintenance and 24h emergency service
Service team available around the clock for maintenance and fault clearance.
Locations

Hameln
DEHead office of the parent company Bertuleit & Bökenkröger GmbH; refrigeration technology, air conditioning systems,
- Part weight / size
- 1–2,000 kW system capacity
- Lot size
- approx. 600 projects/year group-wide
- Materials
- Refrigeration, air conditioning and heat pump technology
- Planning and engineering
- Special unit manufacturing
- Service and leak testing

Northeim
DEBranch Joh. Mattern KÄLTE-KLIMA GmbH, Northeim-Kassel region

Bielefeld
DEBranch ART Bertuleit KÄLTE-KLIMA GmbH, Bielefeld-Paderborn region

Dresden
DEBranch KÄLTE-KLIMA GmbH Dresden, Dresden-Chemnitz region

Sandersdorf-Brehna
DEBranch KÄLTE-KLIMA GmbH Halle-Leipzig, Halle-Leipzig region

Aschheim
DEBranch Bavaria KÄLTE-KLIMA GmbH, Munich region
Systems and installations




Inside the production






Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Refrigeration technology for industry and commerceEngineering | – | – | 1 kW – 2000 kW | – | – |
| Supermarket refrigerationEngineering | – | – | 1 kW – 2000 kW | – | – |
| Air conditioning systems (shop air conditioning)Engineering | – | – | – | – | – |
| Heat pumpsEngineering | – | – | – | – | – |
| Leak testingTesting | – | – | – | – | – |
| Maintenance and service (around the clock / emergency service)Installation | – | – | – | – | – |
| Planning, development and implementation of refrigeration and air conditioning systems, specialEngineering | – | – | – | – | – |
Additional services
Reference customers
Quality and testing
The service offering includes around-the-clock maintenance, a 24-hour emergency service and leak testing for over 40,000 installed systems.
| Evidence | Hameln |
|---|---|
| Leak testing |
History
- 1979
Foundation of the engineering office Bertuleit & Bökenkröger GmbH in Hameln by Reiner Bertuleit and Kurt Bökenkröger; the cornerstone of the KÄLTE-KLIMA Group
- 2018
Jan Bökenkröger joins the company as assistant to the management
- 2021
After 41 years, Kurt Bökenkröger transfers his business shares to his son Jan Bökenkröger
- 2023
Reiner Bertuleit is awarded the Order of Merit of the Federal Republic of Germany
- 2024
Daniel Begere becomes Managing Director as of 01.01.2024; Reiner Bertuleit leaves the management board and remains a shareholder (50%) and consultant