Make-Up Air

In order for the kitchen extract system to function correctly, it is essential that an allowance is made for the provision of replacement air.  This should be acheived either by introducing mechanical supply air, or by making provision for natural infiltration.  (DW/172)

This is particularly important when gas burning appliances are used in the kitchen.  In this instance it is required to comply with gas regulations,

We provide Make-Up Air systems with our extract ventilation.  The Make-Up Air is introduced into the kitchen through the extract canopy itself, through the ceiling or through a wall mounted plenum depending on available space in the kitchen.

All Make-Up Air systems include a filter system to ensure incoming air is not comtaminated with airbourne debris.  If required the incoming air can be heated.

This  particular installation had the Make-Up Air introduced into the kitchen through the extract canopy.  The air was diffused through adjustable grilles mounted into the front face of the hood.