Planning, manufacturing, installation and maintenance of customised ventilation, air-conditioning and extraction systems from a single source.
Kreher Lufttechnik GmbH
71554 Weissach im Tal (Cottenweiler), DENew on Amplifa
Ventilation technology and air-conditioning systems from a single source
Kreher Lufttechnik GmbH, based in Weissach im Tal (Cottenweiler), plans, manufactures, installs and maintains customised ventilation, air-conditioning and extraction systems for industry, trade, gastronomy and hospitality. Every system is designed as a one-off: the planning includes air quality analysis, flow simulation and modelling, while the execution covers new constructions, conversions, modifications to existing systems and dismantling. In its own workshop, the company manufactures custom parts and duct components to customer specification; since 2017, programmable sheet metal processing machines such as a press brake and swing beam shear have been available. The portfolio also includes extraction technology for welding fumes, soldering vapours, technical baths, foundry exhaust air and cleanrooms, high-temperature extraction up to 200°C, heat recovery, and energy-efficient system optimisation with EC fans and demand-based control. Service and maintenance are performed with certified inspections in accordance with VDI 6022, VDMA, DIN 15650 and EnEV 2009. Reference customers come from the aerospace, medical technology, hydraulics and brazing technology sectors.
- Site
- Weissach im Tal
- Processes
- Ventilation system planning and design (simulation/modelling of flow patterns), Installation of ventilation systems (new installation, modification, dismantling, modification of, Manufacturing of ventilation custom parts in the workshop (metal and sheet metal processing), Sheet metal processing with programmable machines (since 2017), Extraction technology (welding fumes, soldering vapours, technical baths, foundry exhaust air,, High-temperature extraction (exhaust gases up to 200°C, permanently resistant, heat-resistant, Service and maintenance of ventilation and air-conditioning systems (filter replacement, unit, Hygiene inspection according to VDI 6022
- Materials
- Metal and sheet metal processing, Programmable press brake, Swing beam shear, Heat recovery, High-temperature extraction, Electrostatic separation
- Certificates
- Hygiene inspection according to VDI 6022, Ventilation unit maintenance according to VDMA, Fire damper inspection according to DIN 15650, Energy-related unit inspection according to EnEV 2009, VDI 6022 (hygiene inspection), VDMA (ventilation unit maintenance), DIN 15650 (fire damper inspection), EnEV 2009 (energy-related unit inspection), ISO 9001
- Founded
- 2003
- Industries
- Industry, Trades/crafts, Gastronomy, Hospitality, Aerospace, Telecommunications
- 01
Consulting
- 02
Planning with flow simulation and modelling
- 03
Design and in-house planning
- 04
Sheet metal processing and manufacturing of custom parts in the workshop
- 05
Installation (new construction, conversion, modification, dismantling)
- 06
Commissioning
- 07
Service, maintenance and hygiene maintenance
Processes and plant technology
Metal and sheet metal processing
In the workshop, ventilation custom parts and duct components are manufactured precisely to customer specification.
Programmable press brake
In use since 2017 for flexible and timely manufacturing of demanding sheet metal components.
Swing beam shear
Programmable sheet metal processing to increase production capacity and quality.
Heat recovery
Recovery of process, compressor and welding exhaust air heat for fresh air heating.
High-temperature extraction
Extraction of exhaust gases up to 200°C, permanently resistant, with heat-resistant hoses and fire gas radial fans.
Electrostatic separation
Cleaning of oil-containing exhaust air directly from machines before feeding into the ventilation system.
Locations
Weissach im Tal (Cottenweiler)
DEAdministration, workshop/manufacturing, warehouse
- Materials
- Sheet steel for ventilation custom parts
- Programmable press brake
- Swing beam shear
- Programmable sheet metal processing machines (since 2017)
Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Ventilation system planning and design (simulation/modelling of flow patterns)Engineering | – | – | – | – | – |
| Installation of ventilation systems (new installation, modification, dismantling, modification ofAssembly | – | – | – | – | – |
| Manufacturing of ventilation custom parts in the workshop (metal and sheet metal processing)Machining | – | – | – | – | – |
| Sheet metal processing with programmable machines (since 2017)Forming | – | – | – | – | – |
| Extraction technology (welding fumes, soldering vapours, technical baths, foundry exhaust air,Engineering | – | – | – | – | – |
| High-temperature extraction (exhaust gases up to 200°C, permanently resistant, heat-resistantEngineering | – | – | – | – | – |
| Service and maintenance of ventilation and air-conditioning systems (filter replacement, unitTesting | – | – | – | – | – |
| Hygiene inspection according to VDI 6022Testing | – | – | – | – | – |
| Ventilation unit maintenance according to VDMATesting | – | – | – | – | – |
| Fire damper inspection according to DIN 15650Testing | – | – | – | – | – |
| Energy-related unit inspection according to EnEV 2009Testing | – | – | – | – | – |
| Energy-efficient system optimisation (EC fans, heat recovery,Engineering | – | – | – | – | – |
| Planning and execution of air-conditioning and full air-conditioning systems (circuit networkEngineering | – | – | – | – | – |
| Industrial ventilation and exhaust with heat recovery (rotating storage mass, electrostaticEngineering | – | – | – | – | – |
| Ventilation technology for production with oil-extracted exhaust air (electrostatic filtration,Engineering | – | – | – | – | – |
| Hall heating with heat recovery from soldering process (damper control, process water cooling, e.g.Engineering | – | – | – | – | – |
| Ventilation systems for retail/commercial with zone control and reversible heat pumps (e.g. 45,000Engineering | – | – | – | – | – |
3 Anlagen & Maschinen
| Machine | Manufacturer / model | Quantity | Working area | Year built | Site |
|---|---|---|---|---|---|
| Programmable press brake | – | – | – | – | Weissach im Tal (workshop) |
| Swing beam shear | – | – | – | – | Weissach im Tal (workshop) |
| Programmable sheet metal processing machines | – | – | – | 2017 | Weissach im Tal (workshop) |
Additional services
Reference customers
Quality and certificates
The employees are trained and hold the certificates required for service and maintenance, including hygiene inspection according to VDI 6022, ventilation unit maintenance according to VDMA, fire damper inspection according to DIN 15650 and energy-related unit inspection according to EnEV 2009.
| Evidence | Weissach im Tal (Cottenweiler) |
|---|---|
| VDI 6022 (hygiene inspection) | |
| VDMA (ventilation unit maintenance) | |
| DIN 15650 (fire damper inspection) | |
| EnEV 2009 (energy-related unit inspection) | |
| ISO 9001 |
Company history
- 1988
Foundation of the sales office for hall heating and ventilation systems by Walter Kreher
- 1998
Start of in-house planning and design of air handling systems and their installation
- 2003
Foundation of Kreher Lufttechnik GmbH – started in a home office and a workshop in a former barn
- 2008
Construction of the new company building in Cottenweiler
- 2017
Investment in programmable sheet metal processing machines (press brake, swing beam shear)
- 2021
Takeover of the company by Markus Weller
- 2022
Warehouse expansion through an additional wooden platform of 80 m²
- 2024
Redesign of the social rooms and the archive as timber construction (approx. 60 m² of added space)
- 2025
Modernisation and expansion of the office spaces