Fire doors are allowed to have windows, generally called observation windows. However, the windows on the fire door must be made of fireproof glass, the size of the window, the joint treatment with the fire door, and the structure of the opening and closing windows must be strictly in accordance with the relevant regulations of the fire department. 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.