Fresh air booster for building into window wall - has shutters and flaps to supply filtered fresh air into rooms where air pressure has dropped

摘要

The device is for topping up room air with fresh air, especially for building in to a window wall. It is installed in an opening in the wall under a window and comprises a box housing containing adjustable air shutters, sound damping flaps, air filters and a sliding box. USE/ADVANTAGE - The device acts as a fresh air booster where room air pressure has dropped. It supplies adequate filtered air through a convector heater and on into the room.