ROOF VENTILATORS
better AIRFLOW
TM
by DESIGN
HRV
HOODED ROOF
VENTILATORS
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Supply or exhaust applications
Direct drive (HRVD) or belt drive (HRVB) arrangements
Spark resistant, cast aluminum airfoil axial impeller
Aerodynamically efficient performance
Heavy duty welded steel base
Aluminum hood with birdscreen
TEFC industrial duty motor
Sizes range from 24” to 60”
TM
Custom Fan Solutions
HRV HOODED ROOF VENTILATORS
PRODUCT SPECIFICATION GUIDE
1.0 GENERAL
A. Fans shall be model HRVD Direct Drive or HRVB Belt Drive Hooded Roof Ventilators as manufactured by Continental
Fan Manufacturing Inc., of Buffalo, NY, and of the size and capacity as indicated on the drawings and fan schedule.
B. HRVD or HRVB Hooded Roof Ventilators shall be furnished as either supply or exhaust as indicated on the
drawings and fan schedule.
C. HRVD or HRVB Hooded Roof Ventilators configured for supply shall be furnished with filters as indicated on the
drawings and fan schedule.
D. Fans shall be rated and tested in accordance with ANSI/AMCA Standard 210-99.
E. All motors and electrical components shall conform to NEMA standards.
2.0 FAN HOUSING - DIRECT DRIVE MODEL HRVD
A. Fan shall be axial flow, roof mount, and direct drive configuration consisting of a hood section and fan housing with
curb base.
B. Fan housing and curb base shall be of welded heavy gauge steel construction.
C. Fan motor base shall consist of heavy gauge steel welded directly to fan housing.
D. Fan housing and motor base shall be coated with an air dried gray enamel finish.
E. Fan shall have an aluminum hood with bird screen.
2.1 FAN HOUSING - BELT DRIVE MODEL HRVB
A. Fan shall be axial flow, roof mount, and belt drive configuration consisting of a hood section and fan housing with
curb base.
B. Fan housing and curb base panel shall be of welded heavy gauge steel construction.
C. Fan motor, shaft and bearings support base shall consist of heavy gauge steel welded directly to fan housing.
D. Fan housing and motor base shall be coated with an air dried gray enamel finish
E. Fan shall have an aluminum hood with bird screen.
3.0 FAN IMPELLER
A. Axial impeller shall be constructed of spark resistant, die cast aluminum airfoil shaped blades secured to a die cast
aluminum hub assembly.
B. Axial impeller blades shall be of adjustable pitch construction with multiple hub-to-blade arrangements to maxi-
mize air performance. Blade pitch angles shall be factory set.
C. Axial impeller hub shall be designed to incorporate a split taper bushing, and be keyed directly to drive shaft.
4.0 FAN MOTOR AND DRIVE
A. Motor shall be TEFC industrial duty and conform to NEMA standards.
B. Motor shall be of voltage, horsepower, RPM and enclosure as indicated on the fan schedule.
C. Fan sheaves shall be cast iron and appropriately sized and aligned.
D. Fan belts shall be static conducting, plus oil and heat resistant.
E. Fan shaft shall be steel, turned, ground and polished.
F. Fan shaft bearings shall be lubricated, self-aligning ball type in cast iron pillow block mounts with external grease fittings.
5.0 OPTIONAL FAN ACCESSORIES
A. Where indicated, fan shall be provided with the following optional accessories:
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Disconnect switches – mounted, or mounted and wired
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Variable pitch sheaves
Pre-fabricated roof curbs
2” disposable filters, for filtered intake unit
Motor operated damper (supply or exhaust)
Gravity shutter for exhaust only
Custom curb base
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NEMA 3R non-fused
NEMA 4X non-fused
Motors
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Explosion proof
Special duty
Protective coatings
Inspection door
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Epoxy
Eisenheiss
6.0 FAN TESTING
A. Axial impeller shall be balanced and mounted in fan assembly.
B. Fan assembly shall be run and tested prior to shipment.
C. A test report shall be maintained on file for each individual fan.
HRV HOODED ROOF VENTILATORS
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