Envanio designs, manufactures and services exhaust air purification systems, heat recovery and silencer systems for industry.
Envanio Germany GmbH
Bietigheim-Bissingen · Goldkronach · Vimodrone (IT) · São Paulo (BR) · Waterloo (CA) · Shanghai (CN) · Évry-Courcouronnes (FR) · Pune (IN) · Seoul (KR) · Göteborg (SE) · Hinckley (GB) · WarringtonNew on Amplifa
About Envanio
Envanio Germany GmbH, which emerged from the environmental technology division of Dürr founded in 1968 in Bietigheim-Bissingen, develops and manufactures turnkey systems for industrial exhaust air purification and heat recovery. The portfolio includes regenerative thermal oxidizers (RTO), electrically heated RTOs (eRTO), catalytic hot gas filtration with ceramic filter elements, activated carbon adsorption with solvent recovery, VOC concentrators, as well as pyrolysis and ORC technology for CO2-free power generation from waste heat. Under the Envanio Universal brand (formerly Universal Silencer, founded 1959), industrial silencers, filters as well as inlet and outlet systems for gas turbines are also produced. At the headquarters in Bietigheim-Bissingen and in Goldkronach (LTB), systems are planned, manufactured, installed and serviced throughout their entire life cycle. The company employs more than 1,300 people worldwide at 16 sites in 12 countries and most recently generated annual revenue of over 400 million EUR. RTO systems achieve a purification efficiency of over 99.8%. Customer industries include chemicals, pharmaceuticals, automotive, surface technology, food and animal feed, metallurgy, building materials, glass, wood-based materials, semiconductors and power generation.
- Site
- Bietigheim-Bissingen
- Processes
- Regenerative Thermal Oxidation (RTO), Electric Regenerative Thermal Oxidation (eRTO), Catalytic Hot Gas Filtration (3-in-1, ceramic filter elements), Carbon Adsorption (activated carbon, solvent recovery), Adsorptive VOC Concentration (rotor concentrators) with thermal oxidation, Mercury Removal (adsorption with activated carbon or lignite coke), Heat Recovery / Waste Heat to Power (Organic Rankine Cycle, CO2-free power), Engine Exhaust Silencers
- Materials
- Regenerative thermal oxidation, Electrically heated RTO, Catalytic hot gas filtration (3-in-1), Activated carbon adsorption, Rotor VOC concentrators, Mercury removal, Organic Rankine Cycle, Pyrolysis technology
- Certificates
- ISO 9001
- Founded
- 1968 (as
- Employees
- 1,300+
- 01
Engineering & feasibility studies
- 02
System planning & manufacturing
- 03
Installation & commissioning
- 04
Inspection, maintenance & spare parts
- 05
Smart Services (Track & Monitor)
- 06
Retrofit & modernization
Processes & Technologies
Regenerative thermal oxidation
Energy-saving oxidation of VOC and HAP with ceramic heat exchangers, purification efficiency over 99.8%.
Electrically heated RTO
Avoids combustion-related by-products and significantly reduces NOx emissions.
Catalytic hot gas filtration (3-in-1)
Removes dust, heavy metals, SOx and NOx simultaneously in a compact system with ceramic filter elements.
Activated carbon adsorption
Physical adsorption of VOC/HAP with optional solvent recovery.
Rotor VOC concentrators
Concentrates high-volume, low-solvent exhaust air streams prior to thermal oxidation and reduces energy requirements.
Mercury removal
Adsorption stages with activated carbon or lignite coke against heavy metals in hot gases.
Organic Rankine Cycle
Conversion of industrial waste heat into CO2-free electricity.
Pyrolysis technology
Conversion of production waste into fuel gas (LTB origin).
Industrial silencers
Engine, blower, absorption and vacuum pump silencers for machinery and turbines.
Gas turbine inlet/outlet systems
Design, manufacturing, retrofit and service for air inlet and exhaust systems.
Products & Systems
Inside the production
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Regenerative Thermal Oxidation (RTO)Engineering | – | – | – | – | – |
| Electric Regenerative Thermal Oxidation (eRTO)Engineering | – | – | – | – | – |
| Catalytic Hot Gas Filtration (3-in-1, ceramic filter elements)Engineering | – | – | – | – | – |
| Carbon Adsorption (activated carbon, solvent recovery)Engineering | – | – | – | – | – |
| Adsorptive VOC Concentration (rotor concentrators) with thermal oxidationEngineering | – | – | – | – | – |
| Mercury Removal (adsorption with activated carbon or lignite coke)Engineering | – | – | – | – | – |
| Heat Recovery / Waste Heat to Power (Organic Rankine Cycle, CO2-free power)Engineering | – | – | – | – | – |
| Engine Exhaust SilencersEngineering | – | – | – | – | – |
| Absorptive SilencersEngineering | – | – | – | – | – |
| Blower Silencers (inlet/outlet fan silencers)Engineering | – | – | – | – | – |
| Cartridge Filters and Filter SilencersEngineering | – | – | – | – | – |
| Vacuum Pump Silencers / Liquid Separator-SilencersEngineering | – | – | – | – | – |
| Gas Turbine Inlet and Exhaust Systems (design, manufacture, retrofit)Engineering | – | – | – | – | – |
| Pyrolysis Technology (conversion of production waste into fuel gas)Engineering | – | – | – | – | – |
| Inspection & Maintenance of Air Pollution Control SystemsTesting | – | – | – | – | – |
| Retrofit & Modernization of Air Pollution Control SystemsAssembly | – | – | – | – | – |
| Smart Services Track & Monitor (remote monitoring)Testing | – | – | – | – | – |
| Coating Services for Gas Turbine Air Inlet SystemsSurface | – | – | – | – | – |
| Field Services for Gas Turbines (installation, inspection, repair, certified welding inspection)Assembly | – | – | – | – | – |
Additional services
Quality
Envanio Universal is ISO 9001 certified; service technicians are OSHA safety-trained and certified welding inspectors are available for maintenance projects. A global service and warehouse network enables up to 1,000 spare parts shipments per month.
| Evidence | Bietigheim-Bissingen | Goldkronach | Stoughton, WI | De Pere, WI |
|---|---|---|---|---|
| ISO 9001 |
History
- 1959
Founding of Universal Silencer in the USA (later Envanio Universal)
- 1968
Dürr establishes 'Environmental Technology' business unit in Bietigheim-Bissingen
- 1970
First thermal exhaust air purification system for the automotive industry; expansion into further industries and markets (Europe, USA)
- 1980–1990
Development of the first regenerative thermal oxidizer (RTO); entry into the Asian market
- 1990–2000
Founding of the 'Environment and Energy Systems' division; acquisition of US companies Reeco and Engelhard
- 2000–2010
Sites in Italy, China, South Korea, Brazil and India
- 2013
Acquisition of Luft- und Thermotechnik Bayreuth GmbH (LTB), Goldkronach
- 2015
Dürr Cyplan Ltd. becomes a 100% wholly owned subsidiary
- 2016
Acquisition of KBA-Clean Air, integration into Bietigheim-Bissingen
- 2017
Universal is acquired by Babcock and Wilcox
- 2018
Acquisition of Babcock & Wilcox's industrial environmental technology business (MEGTEC, Universal) by Dürr
- 2025
Dürr AG sells 75% of the shares in 'Clean Technology Systems' to a subsidiary of Stellex Capital Management LLC (approx. 25% retained stake); independent company Dürr CTS is formed on 1.11.2025
- 2026
Renaming of Dürr CTS to Envanio; Dürr Universal is merged into Envanio Universal