There are many specifications of fire doors, which can be made with windows or customized according to user requirements. The glass on the fire door must be fire proof glass, which is fired in a high temperature flame of more than 1000 degrees. After testing, it can be kept for 90 minutes or even longer, without melting or explosion.

Deriyên agir ZHTdoors, 31 sal ezmûna hilberînê di deriyê agir û pencereyan de. Deriyên agir ên sereke yên UL, deriyên agir EN, deriyên agir BS EN, hwd.. Em xwedî sertîfîkayê ne.