These roof mounted direct drive upblast ventilators are designed to exhaust foul air fumes odors and grease laden vapors. Centrifugal roof ventilator upblast direct drive application the atd roof exhauster is designed for roof mounted exhaust of relatively clean air for applications that require the exhausted air to be moved up and away from the building and where re entry into the building supply air is possible. The fans are suitable for applications ranging from storage room to fume hood exhaust and kitchen grease exhaust to smoke control. 
				
			
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