Clean exhaust air, without particles and any organic compounds, such as grease and smells, is for several reasons, including government requirements, a prime target.
On one hand, limiting values are stipulated by the different Government emission protection legislations in different countries, and on the other, additional requirements from local authorities or complaints from residents, for example when there are increases in smells in houses or apartment blocks, make the treatment of exhaust air necessary.
During the preparation of meals using greases and oils, in kitchens, canteens and in industry, greasy steams are produced as well as smells, which are conveyed outside by the exhaust system. The grease traps installed in kitchen exhaust hoods or ventilation units can capture only up to 95% of the grease in the exhaust. Consequently, there are extensive grease deposits in the hoods, suspended ceilings, exhaust channels and exhaust fans which lead to the following problems:
- Danger of fire
- High, recurring cleaning costs without sustainability
- Exhaust smells often connected with problems of complaints from neighbours or regulations
- Unhygienic microbiological contamination
- Grease covering of all the extraction parts, including sensors, motors, valves and fans, with high associated maintenance costs