Specification Sheet

341
Bearings (belt drive)
Cast iron pillow blocks,
double sealed and
prelubricated, designed for
200,000 hour life.
Drives (belt drive)
Adjustable pitch
through 3HP, all are
sized for minimum
150% of drive HP.
Propeller
Adjustable pitch
aluminum airfoil blades.
Panel Assembly
All welded, heavy-duty
spun galvanized structure
for reliable and efcient
operation.
Stack/Curb Cap
All galvanized heavy-
gauge steel. (aluminum
optional)
Rain Gutter
To prevent water
entrainment.
Hood
Heavy-gauge
galvanized steel pivots
for access to fan.
UL Standard 705 (optional)
Listing assures electrical reliability.
Not available on HRSD units.
Factory Run & Tested
Assures dependable
operation.
CONSTRUCTION FEATURES AND OPTIONS
MODELS HRSB & HRSD
HOODED PROPELLER ROOF SUPPLY FANS