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 27¼ inch width, 29 inch height, 28⅜ inch length. This centrifugal downblast roof exhaust fan is designed for use with: industrial and commercial buildings. In addition, it is roof mountable, 4,062 cfm air flow, 28⅜ inch diameter, and 1 max horsepower.
Technical Specs
ItemCentrifugal Downblast Roof Exhaust Fan
AssemblyUnassembled
Wheel Diameter16 3/4 in
Base Width26 in
Minimum Airflow1,624 cfm
Maximum Motor Horsepower1 hp
Minimum Motor Speed865 RPM
Maximum Static Pressure1 1/2 in wc
StandardsAMCA Sound and Air, UL/cUL 705
Wheel MaterialAluminum
Overall Diameter28 3/8 in
Overall Length28 3/8 in
Includes Drive PackageDrive Package Not Included
ApplicationIndustrial and Commercial Buildings
Bearing TypeSealed Pillow Block
Compatible Curb Manufacturer Part Number2RB77, 2ZV83, 3C437, 4C454, 4HX40, 4HX48
Cutout Size21.5 in L x 21.5 in W
Electrical ConnectionPower Cord
Housing Length28.4 in
Housing Width28.4 in
Maximum Fan Speed1,375 RPM
Motor LocationOut of Airstream
Noise Level @ 0.000 in SP @ 5 ft10 sones
Power SourceElectric Motor
Resistance PropertiesWeather Resistant
Sound LevelFan RPM 1100: 15.3 sones @ 0.000 in SP and 5 ft, 14.7 sones @ 0.125 in SP and 5 ft, 14.1 sones @ 0.250 in SP and 5 ft, 13.8 sones @ 0.375 in SP and 5 ft, 13.5 sones @ 0.500 in SP and 5 ft, 13.0 sones @ 0.625 in SP and 5 ft, 12.5 sones @ 0.750 in SP and 5 ft, 12.0 sones @ 0.875 in SP and 5 ft, Fan RPM 1250: 17.9 sones @ 0.000 in SP and 5 ft, 17.4 sones @ 0.125 in SP and 5 ft, 17.0 sones @ 0.250 in SP and 5 ft, 16.6 sones @ 0.375 in SP and 5 ft, 16.3 sones @ 0.500 in SP and 5 ft, 16.0 sones @ 0.625 in SP and 5 ft, 15.6 sones @ 0.750 in SP and 5 ft, 15.2 sones @ 0.875 in SP and 5 ft, 14.9 sones @ 1.000 in SP and 5 ft, Fan RPM 1375: 21.0 sones @ 0.000 in SP and 5 ft, 20.0 sones @ 0.125 in SP and 5 ft, 19.6 sones @ 0.250 in SP and 5 ft, 19.2 sones @ 0.375 in SP and 5 ft, 18.9 sones @ 0.500 in SP and 5 ft, 18.6 sones @ 0.625 in SP and 5 ft, 18.4 sones @ 0.750 in SP and 5 ft, 18.0 sones @ 0.875 in SP and 5 ft, 17.6 sones @ 1.000 in SP and 5 ft, 17.2 sones @ 1.250 in SP and 5 ft, 15.4 sones @ 1.500 in SP and 5 ft, Fan RPM 865: 10.6 sones @ 0.000 in SP and 5 ft, 10.6 sones @ 0.125 in SP and 5 ft, 9.7 sones @ 0.250 in SP and 5 ft, 9.4 sones @ 0.375 in SP and 5 ft, 8.8 sones @ 0.500 in SP and 5 ft, Fan RPM 945: 12.6 sones @ 0.000 in SP and 5 ft, 12.0 sones @ 0.125 in SP and 5 ft, 11.5 sones @ 0.250 in SP and 5 ft, 11.2 sones @ 0.375 in SP and 5 ft, 10.7 sones @ 0.500 in SP and 5 ft, 10.0 sones @ 0.625 in SP and 5 ft
Speed ControllableSpeed Not Controllable
Drive TypeBelt Drive
Mounting LocationRoof
Base Length26 in
Base ShapeSquare
Maximum Airflow4,062 cfm
Minimum Motor Horsepower1/4 hp
Maximum Motor Speed1,375 RPM
For High-Static Pressure ApplicationsNot For High-Static Pressure Applications
For Air TypeClean Air
Housing MaterialAluminum
Overall Height29 in
Overall Width27 1/4 in
Includes MotorMotor Not Included
Base Height1.8 in
Brake Horsepower13/50 hp
Cutout Length21.5 in
Damper Size19 x 19 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 Diameter3/4 in
Safety FeaturesBirdscreen, Windband
Spark Resistant Construction TypeA
Wheel TypeBackward Inclined
Country of OriginUnited States
(subject to change)
