The steel fireproof door has excellent sealing performance. It is tightly closed, and will not leave a crack in the door to make the cold air overflow. As long as the steel fire door is pushed open by hand, it will automatically close quietly, and will not produce a collision sound like the internal and external door opening, thus creating a quiet environment.

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.