The centrifugal roof upblast exhaust fans include both direct and belt drive options with efficient backward inclined centrifugal wheels and aerodynamic inlet cone minimizing system effects. Belt drive upblast roof mount exhaust fans belt drive fans are quieter and have a longer life span than direct drive fans because components can be replaced if worn or damaged. 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.
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