Labguard India Pvt. Ltd. Offers Remote Blowers with Fume Hoods Installations. Labguard India Pvt. Ltd. Is an ISO 9001:2000 certified company. The Remote Blowers with Fume Hoods Installations utilizing remote blowers are the most common type. Since the entire duct length is under negative air pressure, any leakage in the duct is drawn in and contained rather than pushed out into the building environment. The exhaust blower is positioned on the building`s exterior, usually on the rood` where noises is less noticeable. By creating suction within the ductwork, blowers draw air from the laboratory room, through the hood and the duct system.