The  BC and BS used in blowing or extraction mode are proposed in mechanical ventilation systems. They are normally used for individual housings and in tertiary applications if necessary.

• Used to extract air in mechanical ventilation systems single or double air-flow.
• Can be associated to a flow regulator.
• Made in white plastic.

• Simply fitted in a rigid duct, or associated with a 3-claw plasterboard sleeve, a slab penetration sleeve or an angled duct for the Ø 80 mm
•  BC valve only in Ø125 mm
•  BS valve only in Ø80 mm