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防火門，31年防火門窗生產經驗。 主營UL防火門、EN防火門、BS EN防火門等。我們有認證。ZHTdoors支持OEM和免費設計。我們的優勢：質量好，出廠價，服務好。歡迎諮詢。