UL fireproof doors have been proved to be fireproof tested by the door components in the fire test conducted according to the standards, to ensure their fire performance characteristics as fireproof doors. American standard fire door, wh certificate based on ul standard, with 20-180 minute fire certificate.

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.