Suction grilles type HN 200/100 and Adjustable cone suction type DVS 125 with debits according to the calculations are provided for suction of the exhaust air from the premises. The evacuation of the exhaust air is organized by a galvanized steel duct located in the suspended ceiling passing to the roof of the building. All grilles are connected to the main duct with a flexible air duct Ф125. The thrust is achieved through a fan blower with a flow rate of 970 m3 / h, a head of 260 Pa, a power of 315 W at 220V, located in the suspended ceiling of the sanitary unit No.10
Fresh air ventilation grilles type HN 200/100 and Adjustable cone suction type DVS 125 with flow rates according to the calculation are provided to provide the necessary fresh air. The air is supplied by a ventilation system that supplies only a laboratory room. The air is filtered, processed during the winter period by means of an electric calorifier and pushed through a circular duct fan with parameters of 70 m3/h 140 Pa Nel = 58W.
For the suction of the air from the room Waste is provided a suction grille type HN 200/100 with V = 40 m3/h, the calculations are made for min.10 air exchange ratio. Evacuation of exhaust air is carried out by Spiral duct made of galvanized sheet Ф100mm located in the suspended ceiling.
The thrust is achieved through a fan blower with a flow rate of 40 m3/h, a head of 60 Pa, a power of 75 watts at 220V. Discharging is above the roof of the building. Fresh air for the flow system is taken from a level of 2,80 m above terrain. To regulate the operation of the systems, speed regulators for all fans and regulating sections for all ventilation grilles are provided.