This centrifugal downblast roof exhaust fan includes NEMA 1 junction box, and is made of aluminum. It features a fully rolled windband bead, fresh outside air is drawn in under the motor cover, and more and measures 38⅜ inch width, 40⅛ inch height, 42¾ inch length. This centrifugal downblast roof exhaust fan is designed for use with: industrial and commercial buildings. In addition, it is roof mountable, 8,355 cfm air flow, and 42¾ inch diameter, and 3 max horsepower.
Technical Specs
ItemCentrifugal Downblast Roof Exhaust Fan
AssemblyUnassembled
Wheel Diameter24 in
Base Width34 in
Minimum Airflow2,036 cfm
Maximum Motor Horsepower3 hp
Minimum Motor Speed460 RPM
Maximum Static Pressure1 1/2 in wc
StandardsAMCA Sound and Air, UL/cUL 705
Wheel MaterialAluminum
Overall Diameter42 3/4 in
Overall Length42 3/4 in
Includes Drive PackageDrive Package Not Included
ApplicationIndustrial and Commercial Buildings
Bearing TypeRegreasable Pillow Block
Compatible Curb Manufacturer Part Number2RB80, 2ZV84, 3C438, 4C455, 4HX42, 4HX50
Cutout Size29.5 in L x 29.5 in W
Electrical ConnectionPower Cord
Housing Length42.8 in
Housing Width42.8 in
Maximum Fan Speed910 RPM
Motor LocationOut of Airstream
Noise Level @ 0.000 in SP @ 5 ft6.7 sones
Power SourceElectric Motor
Resistance PropertiesWeather Resistant
Sound LevelFan RPM 460: 6.7 sones @ 0.000 in SP and 5 ft, 6.6 sones @ 0.125 in SP and 5 ft, 5.7 sones @ 0.250 in SP and 5 ft, 4.2 sones @ 0.375 in SP and 5 ft, Fan RPM 505: 7.8 sones @ 0.000 in SP and 5 ft, 7.5 sones @ 0.125 in SP and 5 ft, 6.9 sones @ 0.250 in SP and 5 ft, 6.1 sones @ 0.375 in SP and 5 ft, Fan RPM 585: 10.3 sones @ 0.000 in SP and 5 ft, 9.7 sones @ 0.125 in SP and 5 ft, 9.1 sones @ 0.250 in SP and 5 ft, 8.8 sones @ 0.375 in SP and 5 ft, 8.2 sones @ 0.500 in SP and 5 ft, 7.2 sones @ 0.625 in SP and 5 ft, Fan RPM 660: 13.1 sones @ 0.000 in SP and 5 ft, 12.4 sones @ 0.125 in SP and 5 ft, 11.8 sones @ 0.250 in SP and 5 ft, 11.3 sones @ 0.375 in SP and 5 ft, 11.0 sones @ 0.500 in SP and 5 ft, 10.6 sones @ 0.625 in SP and 5 ft, 10.4 sones @ 0.750 in SP and 5 ft, Fan RPM 730: 15.8 sones @ 0.000 in SP and 5 ft, 15.0 sones @ 0.125 in SP and 5 ft, 14.3 sones @ 0.250 in SP and 5 ft, 13.8 sones @ 0.375 in SP and 5 ft, 13.4 sones @ 0.500 in SP and 5 ft, 13.1 sones @ 0.625 in SP and 5 ft, 12.9 sones @ 0.750 in SP and 5 ft, 12.7 sones @ 0.875 in SP and 5 ft, Fan RPM 825: 19.7 sones @ 0.000 in SP and 5 ft, 18.6 sones @ 0.125 in SP and 5 ft, 17.7 sones @ 0.250 in SP and 5 ft, 17.2 sones @ 0.375 in SP and 5 ft, 16.8 sones @ 0.500 in SP and 5 ft, 16.4 sones @ 0.625 in SP and 5 ft, 16.2 sones @ 0.750 in SP and 5 ft, 15.6 sones @ 0.875 in SP and 5 ft, 14.8 sones @ 1.000 in SP and 5 ft, Fan RPM 910: 24.0 sones @ 0.000 in SP and 5 ft, 23.0 sones @ 0.125 in SP and 5 ft, 21.0 sones @ 0.250 in SP and 5 ft, 21.0 sones @ 0.375 in SP and 5 ft, 21.0 sones @ 0.500 in SP and 5 ft, 20.0 sones @ 0.625 in SP and 5 ft, 19.6 sones @ 0.750 in SP and 5 ft, 19.4 sones @ 0.875 in SP and 5 ft, 19.2 sones @ 1.000 in SP and 5 ft, 16.7 sones @ 1.250 in SP and 5 ft, 13.6 sones @ 1.500 in SP and 5 ft
Speed ControllableSpeed Not Controllable
Drive TypeBelt Drive
Mounting LocationRoof
Base Length34 in
Base ShapeSquare
Maximum Airflow8,355 cfm
Minimum Motor Horsepower1/4 hp
Maximum Motor Speed910 RPM
For High-Static Pressure ApplicationsNot For High-Static Pressure Applications
For Air TypeClean Air
Housing MaterialAluminum
Overall Height40 1/8 in
Overall Width38 3/8 in
Includes MotorMotor Not Included
Base Height1.8 in
Brake Horsepower13/50 hp
Cutout Length29.5 in
Damper Size27 x 27 in
FeaturesAir Handling Quality Bearings Meet Minimum of L10-100,000 Hours, Features a Fully Rolled Windband Bead for Increased Stability and Easy Transport, Fresh Outside Air is Drawn in Under the Motor Cover to Maximize Motor Life, Nema 1 Junction Box Located in Motor Enclosure, Nonoverloading Centrifugal Wheel Design, Optional Nema 1 and 4 Disconnects Available
Housing Material FabricationSpun
IncludesNEMA 1 Junction Box
Maximum Inlet Air Temperature180 Degrees F
Mount TypeRoof Curb
Number of Speeds1
Propeller Shaft Diameter1 in
Safety FeaturesBirdscreen, Windband
Spark Resistant Construction TypeA
Wheel TypeBackward Inclined
Country of OriginUnited States
(subject to change)