The fire door is highly airtight, and it is impossible to leave a gap to make the air conditioner and radiator flow out as long as it is closed in time. After the fire door is installed and closed, the gap shall not be too large, otherwise the sealing performance of the fire door cannot be guaranteed, and its function of restraining fire and smoke spread cannot be reflected under fire conditions.

ZHTdoors kofofin wuta, shekaru 31 na ƙwarewar samarwa a cikin kofofin wuta da Windows. Babban UL wuta kofofin, EN wuta kofofin, BS EN wuta kofofin, da dai sauransu,.Muna da certification.ZHTdoors goyon bayan OEM da free design.Our abũbuwan amfãni: kyau quality, factory farashin, mai kyau service.Barka da tuntubar mu.