Replacement Air

In order for the kitchen ventilation system to function correctly the need for replacement air should be taken into account.

In smaller kitchens, replacement air may be drawn in naturally via grilles in walls, doors or windows. In larger kitchens a mechanical input system will be required, and should provide a maximum of 85% of the total air extracted.

Replacement air may be introduced into the kitchen by various methods, such as through ceiling grilles or the canopy supply air plenum. Whichever system is used, the air must be filtered to prevent insects and other particles entering the kitchen.