To meet requirements in the field of industrial air technology, ETS has established an in-house competence center. Here you get all services required for the conceptual design and implementation of air technology systems. In addition to providing general advice, it offers a wide range of services such as current-state analysis and studies, basic engineering, dimensioning, and planning services:

Industrial Air Technology Competence Center

ETS Efficient Technical Solutions GmbH
Kompetenzzentrum Industrielle Lufttechnik 

Friedrich-List-Straße 1 • 35398 Gießen • Germany

Fon: +49 (0) 641 931128 - 0
Fax: +49 (0) 641 931128 - 27



  • Conception of ventilation systems
  • Consultation in connection with safety and emission regulations issued by authorities and professional associations
  • Technical and power-related current-state analysis
  • Energy efficiency analyses and development of energy optimization concepts
  • Feasibility studies and energy flow analyses
  • Design, engineering, supply, installation, and commissioning of air-conditioning components and special systems
  • Set-up of energy-efficient air supply systems according to the principle of stratified flow
  • Reduction of diffuse emissions in the working area (MAC – maximum allowable concentration) and in the environment (TA-Luft – Technical Instructions on Air Quality Control; BImSchG – Federal emission protection law)
  • Design of efficient smoke extraction system

Topics & fields

• Industrial air technology

• Ventilation and air-conditioning systems

• Power engineering

• Smoke extraction systems

Air-conditioning services

When conducting field campaigns, the first step is to measure the characteristic values of air conditioning systems.

An extensive pool of instruments is available for this purpose. In addition, convection volume flows that are based on thermal loads and are frequently influenced by transverse flows are identified which cause the ingress of hazardous substances in the production process (gases, dust, aerosols, etc.).

If necessary, associated accredited meter operators determine the quantity and concentration of hazardous substances at the workplace (MAC).

The main task is to determine the key planning figures for thermal and substance mass flow rates, since this knowledge will be essential for balancing, selection, and planning of technical exhaust and supply air components and of the entire plant.

Basic engineering

Basic engineering encompasses the assessment and classification of all findings collected in the course of current-state analyses for the specific application. Based on the key planning figures determined by ETS, a custom technical system concept can be developed.


ETS systems engineering is always dimensioned individually – for safe compliance with the occupational exposure limit value of hazardous substances (AGW/OEL), comfort criteria and energy-efficient operation. The ETS exhaust and supply air components, which are designed and constructed for the specific loading condition, are a determining factor for the quality of the entire system.


The service range of the industrial air technology competence center comprises planning services of the HOAI stages 1–4. Further planning stages are offered in cooperation with the respective ETS sites.

Collection elements




(Patent pending)

  • Versatile application, especially for pulse-loaded and thermally superimposed emissions from longitudinally extended sources
  • Stagnation point-free collection of linear emission sources
  • Minimized capture volume flow
  • High degree of pollutant capture
  • Smaller separating systems
  • Optimum accessibility to emission sources from above for folding version
  • Reduced susceptibility to contamination
  • Simple and flexible design allowing versatile modifications and adaptations
  • Reduction of operating costs



  • Generation of an artificial “cyclone” or “typhoon” by superimposition of vacuums
  • Peripheral speeds of the rotation field up to 70 m/s
  • Vacuums in the center more than 1,000 Pa
  • Versatile application, especially for pulse-loaded and thermally superimposed emissions
  • Stagnation point-free capture of linear emission sources

ETS Nozzle Plate

  • Smallest possible mounting distance to emission source
  • Particularly high depth effect
  • Minor susceptibility to transverse flows and excellent quality
  • Stabilized capture of point-shaped emission sources
  • Reduction of operating costs

ETS Bath Rim Capture

  • Reduction of capture volume flow
  • High degree of pollutant capture
  • Smaller separating systems
  • Optimum accessibility from above
  • Lower susceptibility to contamination
  • Reduction of operating costs
Absaugung einer LKW-Beladestelle

Ventilation of a truck loading station for dusty excess materials from metal processing

During processing of metallic compounds, excess materials are produced during processing in the form of dusty materials with highly variable grain size. Particularly during loading by wheel loaders into open dump trucks, dispersible dust particles are produced, which can lead to heavy emissions.

Within a few minutes the whole loading area is full of dust, which subsequently also spreads to adjacent areas. According to work safety requirements and pollution control laws, it is necessary to prevent this uncontrolled spreading by means of suitable process-related and ventilation measures.

Image: Extraction of a truck loading point / Loading of dusty excess materials by means of a wheel loader on a dump truck without exhaust equipment.

The industrial air technology competence center at ETS has been assigned to perform an on-site technical current-state analysis and based on this to prepare a ventilation concept to prevent pollution. With the findings from the current-state analysis they were able to determine the design of a collection element (extraction hood) and the necessary parameters. In this context, the process sequences during the loading process were analyzed and the spreading characteristics recorded by video and evaluated. Even all basic conditions influencing the emission behavior such as transverse flow effects were determined and taken into consideration. As a result, an extraction unit in the form of the ETS nozzle hood was analyzed and designed in line with the local building and the vehicles involved.

Absaugung einer LKW-Beladestelle

The ETS nozzle hood consists of a row of flow-optimized inlet nozzles in an even panel surface, which forms a stabilized nozzle flow in its layering. In comparison with the flow characteristics of conventional box-shaped or trapezoidal overhead hoods, the highly energy-efficient ETS nozzle hood has a significantly greater intake intensity and thus lower requirement of extraction volume flow, along with stabilization of the emission volume flow influenced by transverse flows in the intake zone.

Image: Extraction of a truck loading station / ETS nozzle hood design concept
Absaugung einer LKW-Beladestelle

The emissions released during the loading process are collected directly from the place they are generated, and then are extracted with high efficiency. Spreading of the fine dust into adjacent areas of the facility is effectively prevented, and largely dust-free loading of dusty excess material is ensured by use of the ETS nozzle hood. 

Extraction of a truck loading station
Loading of dusty excess materials by means of a wheel loader onto a dump truck. No emission formation due to efficient extraction by means of the ETS nozzle hood.

Supply air elements

ETS-Schichtluftauslass (LA-S)

ETS Layered Air Outlet (LA-S)

  • Innovative layered air outlet for generating a stratified air system with two air layers, fresh air inlet at ground level and displacement of contaminated air to the hall ceiling area
  • Even air output according to comfort criteria based on innovative outflow technology
  • Avoidance of air drafts due to slow air outflow velocities
  • Optimum suitability for all workstations in close proximity to thermal processes
ETS-Schichtluftauslass (LA-L)

ETS Layered Air Outlet (LA-L)

  • Rectangular laminar outlet for generation of a layered air system
  • Even pulse-free outflow over the entire outlet surface
  • Overhead arrangement of LA-L possible, thus suitable as single workstation ventilation unit (non-integrated application)
  • Optimum suitability for all workstations in immediate proximity to thermal processes with or without release of hazardous substances