UL fireproof door can ensure the safety of personnel and property to a large extent within the time required by the standard. UL fireproof door can give consideration to thermal insulation, sound insulation, air tightness and other properties.

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.