AbstractA roof mountable kitchen grease exhaust blower isconstructed with hinged housing elements which can be raisedfor easy service access to all parts of the unit. Redundantblower drive motors are provided either of which can beeasily engaged to the blower wheel in the event of failure ofthe other. A blower wheel drive belt is equally engageable toeither drive motor and changeover from one to the other iseasily and quickly made by minimally skilled personnel. Thenewly engaged drive motor is enabled by a power select switchat the blower control panel.
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