Specification Sheet
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OPTIONS/ACCESSORIES
Solid State Speed Control (STXD): S&P’s solid state control is matched to the motor and blower wheel to allow
continuous reduction in performance allowing adjustments of airow 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.
Constant Pressure Controls (STXDe): (Not for UL762 use) For constant pressure control applications, the S&P constant
pressure control package is available. This package includes the components that are needed to complete a demand-based
exhaust ventilation system for kitchens, bathrooms, and/or clothes dryer exhaust in multi-story buildings. S&P recognized
that the programming procedure for many constant pressure controls can be challenging, so this package is the simplest
system available. The control box can be easily installed in the eld, either mounted on a curb or inside the building. The
backlit LCD display and pressure transducer are pre-programmed to work together to increase or reduce the speed of the
fan to accommodate for the actual demand.
Potentiometer Shipped Loose (STXDe): (Not for UL762 use) If a variable rate that is manually changed by the operator
from the occupied space is desired, the potentiometer is shipped loose and eld installed in the appropriate accessible
location. Simply rotating the dial will vary the speed of the fan from 20% to 100% full speed.
Automatic Belt Tensioner (STXB): Available on sizes
8-16, 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 eciency is enhanced. Benets
include reduction in startup and maintenance costs,
increased belt life, increased drive eciency, 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.
Common Curb: Designed to allow both the supply fan and exhaust fan to be mounted on the same curb.
This curb requires only one roof opening and speeds installation time.
Motor Operated Damper: Motor operated aluminum damper for positive closure against backdraft. (Not
for UL762 use).
Automatic Damper: Automatic aluminum damper for ease in installation and eective backdraft protection.
(Not for UL762 use).
Grease Grabber or Aluminum Grease Trough: Trap designed for fast and inexpensive replacement. Grease collects in
a container for safe and sanitary disposal. Keeps roof clean with proper use.
Curb Hinge Arrangement: The curb hinge arrangement provides easy access to the exhaust fan, backdraft damper, and
duct for servicing and cleaning.
Wheel Cleaning Port: 4” diameter port for access to clean the outside of the wheel. Meets NFPA 96
standards. (Ships loose for installation in the eld).
Birdscreen: To protect the fan from birds and other large objects. (Ships installed when ordered with Build-to-order fans;
ships loose when ordered with stock fans / Quickship)
Insect Screen: Helps prevent insects, snow, airborne mist or water droplets from entering. (Ships installed when ordered
with Build-to-order fans)
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.
MODEL STXD, STXDe & STXB
DIRECT DRIVE & BELT DRIVE CENTRIFUGAL UPBLAST ROOF EXHAUSTERS
Motor Pulley
Fan Pulley
Belt Tensioner Arm
Belt Tensioner Pulley
Belt Tensioner Bracket
Motor Bracket