MODELS HRSB & HRSD
HOODED PROPELLER ROOF SUPPLY FANS
MODEL FEATURES
• Supply air to over 56,000 CFM up to 3/4” w.g.
• Belt drives permit easy performance adjustments when needed
• Direct drive units have low sound levels and quiet operation.
• Filtered models available
• cULus 705 Listed (HRSB only)
MODEL OPTIONS
MODEL NAME DESCRIPTION
HRSB Belt Drive Hooded Propeller Roof Supply Fan
HRSB-F Belt Drive Hooded Propeller Roof Filtered Supply Fan
HRSD Direct Drive Hooded Propeller Roof Supply Fan
HRSD-F Direct Drive Hooded Propeller Roof Filtered Supply Fan
MODEL OVERVIEW
Models HRSB and HRSD are roof mounted supply fans rated from 4,000 to over 56,000 CFM and
to 3/4” static pressure. They are used in a variety of commercial and industrial operations such as
warehouses manufacturing plants, equipment and machinery rooms, assembly plants and similar
facilities to provide fresh outside air for personal comfort and to reduce negative pressure caused by
exhaust systems.
Models HRSB-F and HRSD-F include permanent re-cleanable aluminum filters for application where
filtered supply air is required. Performance ratings include the effect of filters on air delivery.
Belt drive units usually operate more quietly and afford easier performance adjustments, while direct
drive units require less maintenance.
2 year fan housing warranty, 1 year motor warranty
All specifications are subject to change without notice unless approved in submittal by S&P USA.
MODELS HRSB & HRSD
HOODED PROPELLER ROOF SUPPLY FANS
CONSTRUCTION FEATURES AND OPTIONS
Hood
Rain Gutter
Heavy-gauge
To prevent water
galvanized steel pivots
entrainment.
for access to fan.
Drives (belt drive)
Adjustable pitch
through 3HP, all are
sized for minimum
150% of drive HP. Bearings (belt drive)
Cast iron pillow blocks,
double sealed and
Propeller prelubricated, designed for
Adjustable pitch 200,000 hour life.
aluminum airfoil blades.
Panel Assembly
All welded, heavy-duty
Stack/Curb Cap
spun galvanized structure
All galvanized heavy-
for reliable and efficient
gauge steel. (aluminum
operation.
optional)
Factory Run & Tested
Assures dependable
UL Standard 705 (optional) operation.
Listing assures electrical reliability.
Not available on HRSD units.
All specifications are subject to change without notice unless approved in submittal by S&P USA.
MODELS HRSB & HRSD
HOODED PROPELLER ROOF SUPPLY FANS
Construction/Specification Checklist
Panel Assembly
• Heavy-gauge G90 galvanized steel panel.
• One piece spun venturi for maximum efficiency.
• All welded support structure of schedule 40 galvanized pipe.
• Motor/bearing plates of minimum 10 gauge galvanized steel.
• All welds coated with cold galvanized paint.
Hood
• All heavy-gauge G90 galvanized steel.
• Low silhouette design for pleasing appearance.
• Unique design rain gutter minimizes water entrainment.
• Gutter provides additional hood strength and rigidity.
Base
• All galvanized construction for corrosion resistance.
• Secures fan unit to roof curb.
• Elevates fan unit above curb for ease of damper installation.
Propeller
• Two, three, four or six airfoil aluminum blades.
• Steel hub plate with steel taper lock busing.
• Hub finished with corrosion resistant epoxy paint.
• Adjustable pitch for optimum efficiency.
Drives (belt drive models)
• Sized for minimum 150% of drive horsepower.
• Single belt adjustable pitch sheaves through 3HP.
• Two belt fixed pitch sheaves through 10HP.
• Adjustable pitch sheaves are optional above 3HP.
• Adjustable tension rods for belt adjustment.
• Nonstatic oil resistant v-belts.
• Keyed, turned, ground and polished shafts.
Bearings
• Bearings designed for minimum 200,000 hour life, L50.
• Cast iron self-aligning pillow block ball bearings.
• Bearings are sealed, prelubricated with relube fittings.
Motors
• Brands are nationally recognized and locally serviced.
• Open drip-proof construction is standard.
• High-efficiency, explosion proof, totally enclosed, and corrosion duty motors can be specified.
All specifications are subject to change without notice unless approved in submittal by S&P USA.
MODELS HRSB & HRSD
HOODED PROPELLER ROOF SUPPLY FANS
Options/Accessories
Filters: Permanent cleanable aluminum mesh 2” filters installed in hood opening. See pages 298 and
299 for certified performance data with filters in place.
Roof Curb: Prefabricated heavy-gauge galvanized steel, welded construction, 12” high
(other heights are also available) with 1-1/2” wood nailer. Assures perfect fit of unit to roof
opening. Options include burglar bars, single or double pitch construction and hinged
curbs for easy duct access.
Disconnect Switch: Nonfused safety disconnects are available for all motor sizes in rain-tight or open
enclosures. Explosion proof, Nema 4 and 4X are also available.
Motor Operated Damper: Motor operated for positive closure against backdraft.
Automatic Damper: Automatic (counter-balanced) damper for ease in installation.
Bird Screen: 1/2” x 1” wire mesh guard prevents birds and other objects from entering fan.
Fiberglass Free Insulation: Hood crown is covered with 1/2” high performance and ecologically
friendly fiberglass free insulation only, to reduce fan sound and condensation.
Extended Grease Lines: Extended copper grease lines allow motor and/or fan bearings to be
relubricated from the exterior.
Motor Safety Chain: Secures motor to fan unit to prevent motor accidentally falling during maintenance.
Aluminum Construction: Optional aluminum construction available for external fan components
(hood and base) only.
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.
All specifications are subject to change without notice unless approved in submittal by S&P USA.
