AIRTIGHT VENTILATION FAN FLANGE STRUCTURE AND METHOD FOR FIXING VENTILATION FAN TO CEILING

摘要

PROBLEM TO BE SOLVED: To solve the problem of the flange structure of a fan and the fixing method thereof that the size is increased on the periphery of a suction grill being fixed to the opening of the fan because the grill is required to cover also the flange of the fan. SOLUTION: The airtight ventilation fan flange structure has a flange clamped between a ceiling cradling and a ceiling frame member.