Bestanchi Industrial Group, relying on the power of all its experts, has started to operate with the aim of developing technical, engineering, and commercial units, as well as reaching international markets. This company is approved by Tehran Fire Department as a contractor and supplier of ventilation and smoke evacuation equipment. By having experienced experts in this field (from the Tehran Engineering System Organization) and also providing engineering services and complying with the regulations of the Tehran Fire Department, it is ready to receive approval for the ventilation and smoke evacuation system from the Tehran Fire Department. It should be noted that this company has succeeded in receiving numerous approvals in this field with its continuous follow-up, some of which have been included in the projects.