Connection with the flue gas exhaust duct outlet should be thick steel plate or equivalent
fire performance of materials, to be considered in the setting can not be discharged directly blowing smoke with the other Fire Hazardous or dangerous parts of the building, can not impede the evacuation and fire fighting activities, which does not allow discharge of gas no longer be Ventilation Or air conditioning such as inhalation. When the gas discharge outlet when located outdoors must be strong, and to prevent rain, birds and insects such as intrusion and damage.