Fire doors are divided into Class A, Class B and Class C according to the fire rating. Among them, the fire resistance time of Class A fire doors is not less than 90 minutes. As long as the fire doors meet this condition, they can be called Class A fire doors. Welcome to consult us.

ZHTdoors fire doors, 31 years of production experience in fire doors and Windows. The main UL fire doors, EN fire doors,  BS EN fire doors, etc.,.We have certification.ZHTdoors support OEM and free design.Our advantages:good quality, factory price, good service.Welcome to consult us.