'In line' Duct Mounted Odour Control 

As an alternative to the EXE UV-C unit, Extechnology has developed a new 'in line' odour control system which uses UV-C technology to significantly reduce cooking smells. 

The Extechnology EXD unit is based on the synergy, which occurs when ozone and ultra-violet light are combined to harness the full effect of UV-C technology.  Reserved for heavy type cooking environments the EXD unit works best when coupled with ESP filtration.  

Extechnology offer a modular system featuring eight to twelve high output UV-C lamps.  A system will be specified according to the nature of the cooking process and the volume of extracted air. 

How it works...

There are two primary chemical reactions that take place in the UV oxidation process. The UV lights emit radiation in the UV-C band and also create ozone in the vicinity immediately surrounding the lamps. The chemical process taking place when UV-C directly hits molecular chains and breaks them into smaller compounds is called Photolysis. The photolysis reaction is most effective on small grease particles (especially vapor) since the light can only break the chemical bonds on the outer surface of the grease particle if it is large. 


The second chemical process that takes place is when the ozone, created from the interaction of the UV light with the oxygen molecules in the air, continues to react with the grease molecules as they move through the exhaust ducts to the outside. This process is called Ozonolysis. The byproducts of the oxidation process (the modified grease molecules, CO2 and water) does not adhere to the duct surfaces and will be carried away by exhaust airflow.