Exhaust air system for electrostatic air cleaner

Claim 1

An electrostatic air cleaner means for control of the air quality in a room and adapted to be mounted in a drop or false ceiling of said room, including: electrostatic air cleaner means having intake air means and discharge air means mounted in a plane that generally coincides with the plane of said false ceiling for said room in which said electrostatic air cleaner means is installed; said electrostatic air cleaner means creating an air flow into said intake air means where said air flow is treated; said treated air flow being subsequently discharged from said electrostatic air cleaner means; exhaust air means opening above said false ceiling and adapted to vent part of said treated air flow above said false ceiling; said exhaust air means having moveable vent closure means; said vent closure means including a sealing portion and air diverting portion with said air diverting portion being adjustably positioned in said treated air flow to deflect a portion of said air flow through said exhaust air means; and said sealing portion of said vent closure means being moved to a position to regulate the amount of said treated air flow that is vented through said exhaust air means and away from said room in which said electrostatic air cleaner means is installed.