The ventilation blower is designed to accommodate most non-hazardous confined space ventilation requirements. It is built with a heavy-gauge construction. This ventilation blower rental is ideal for supplying fresh air around construction sites, removing toxic and noxious atmospheres from confined work spaces, detecting sewer line leaks, and providing fresh air when working in tanks and vaults. Proper ventilation increases safety and worker productivity rates while conforming to tough federal and state OSHA regulations. Sometimes referred to as an exhaust blower or ventilator or extraction fan or extraction blower or a negative vacuum