In short, having proper kitchen ventilation can greatly help in controlling the temperature and air quality, reducing energy loss, eliminating odours and avoiding contamination. Except for Kitchen Ventilation, Air Filtration can be used in many places, such as Industrial Exhaust Ventilation. And for a cleaner environment, many other equipments like HVAC Air Disinfection, Germicidal UV Lamp, Electronic Air Cleaner, Water Filtration, Seawater Desalination. http://www.rzhtec.com/air-filtration/