Specification Sheet

106
OPTIONS/ACCESSORIES
Solid State Speed Control (SDBD): S&P’s solid state control is matched to the motor and blower
wheel to allow continuous reduction in performance allowing adjustments of airow for system balancing.
CFM is reduced in direct proportion to motor speed reduction. Speed control is available for 115 or
230 volt single phase. Exhauster performance can be controlled from the ventilated area.
Automatic Belt Tensioner (SDB): Available on sizes
6-16, 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 SDBD & SDB
exhausters.
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.
MODELS SDBD & SDB
DIRECT DRIVE & BELT DRIVE CENTRIFUGAL DOWNBLAST ROOF EXHAUSTERS
Motor Pulley
Fan Pulley
Belt Tensioner Arm
Belt Tensioner Pulley
Belt Tensioner Bracket
Motor Bracket