An individual unit of HE Electrostatic Air Cleaner (EAC) is installed at the kitchen exhaust duct near to the kitchen hoods to remove cooking contaminants such as smoke, grease particles and oil mist. The exhaust fan pulls the air containing cooking fumes into the EAC through the kitchen hood and ducts. Up to 95% of the cooking fumes is collected by the EAC. Single unit airflow rate is 2500 to 10,000 CMH, depending on the model of the EAC. Once the contaminants are filtered in the EAC, clean air is discharged to the exterior of the building via the exhaust ducts. As the main exhaust duct remains clean, the need for maintenance and the risk of fire are reduced.
Electrostatic Air Cleaners or Electrostatic Precipitators are used in the collection of wet and dry particulates like dust, oil mist, cooking fumes and various pollutants. Contaminated air is drawn by the motor/blower through a washable metal mesh pre-filter which traps large dust particles. The remaining particles, some as small as 0.01 microns, pass into a strong electrical field (ionizing section) where the particulate receives an electrical charge. The charged particles then pass into a collector plate section made up of a series of equally spaced parallel plates. Each alternate plate is charged with the same polarity as the particles, which repel, while the interleaving plates are grounded, which attract and collect the contaminants. The contaminants are held in these plates until they are washed away.