The steel fireproof door has a good airtightness, and it is closed in place and locked tightly, so that no cracks will be left in the door and the cooling and heating will overflow. The steel fireproof door can be provided with windows, louvers, ventilation louvers, etc. as required.

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.