Specification Sheet

127
MODEL DB
BELT DRIVE CENTRIFUGAL ROOF EXHAUSTER
OPTIONS/ACCESSORIES
Automatic Belt Tensioner: Available on sizes 6-24, The
Automatic Belt Tensioners eliminate the need for regular
manual retensioning of drives, and the risk of inadvertently
over-tensioning drive components is avoided and overall drive
operating efciency is enhanced. Benets include reduction in
startup and maintenance costs, increased belt life, increased
drive efciency, and ensure drive components do not snag
obstructions.
Roof Curb: Prefabricated heavy-gauge galvanized steel, welded construction, 12” high (other
heights are also available) with 1-1/2” wood nailer. Assures perfect t of exhauster to roof
opening. Options include burglar bars, single or double pitch construction and hinged curbs for
easy duct access.
Sound Curb: Option of thermal acoustical lining or a complete maximum sound attenuating bafe system.
Provision for mounting damper is available. Contact factory for information regarding effect on exhauster air
performance and sound level.
Motor Operated Damper: Motor operated aluminum damper for positive closure against
backdraft.
Automatic Damper: Automatic aluminum damper for ease in installation and effective backdraft
protection.
Companion Gravity Units: Model RCX-II comes in a wide range of sizes and air capacities to
provide relief or intake air to the system. Curbs and dampers are available to t all sizes. Spun
aluminum hoods provide a pleasing appearance, complementing the Model DB exhauster.
Special Coatings: Powered roof exhausters often require special coatings for protective and decorative purposes.
Available coatings include: Synthetic Resin, Epoxy, and Heresite (air-dried phenolic). Contact your representative
or the factory for more information on available coatings and colors.
Curb Hinge Arrangement: The curb hinge arrangement provides easy access to the exhaust fan, backdraft
damper, and duct for servicing and cleaning.
Motor Pulley
Belt Tensioner Pulley
Belt Tensioner Arm
Fan Pulley
Belt Tensioner
Bracket
Motor Bracket
MODEL DB
BELT DRIVE CENTRIFUGAL ROOF EXHAUSTER