Ventilator.

摘要

A two-part ventilator (1) comprises a housing (2) for securing to a frame (6) to overlie an airpath (7) through the frame (6) and a pivotal flap (3) movable to open and close a ventilation opening (9) in a front face (10) of the housing (2) to control air flow. The housing (2) has integral spring legs (17) arranged to bias the flap (3) to each of the open and closed positions. <IMAGE>