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 28⅜ inch width, 36⅛ inch height, 28⅜ inch length. This centrifugal downblast roof exhaust fan is designed for use with: industrial and commercial buildings. In addition, it has one phase, 60 Hz, is roof mountable, 1,882 cfm @ 0.125 in SP air flow, 28⅜ inch diameter, and ¼ ho
Technical Specs
ItemCentrifugal Downblast Roof Exhaust Fan
AssemblyAssembled
Base Length26 in
Base ShapeSquare
Phase1
Exhaust Airflow @ 0.000 in SP1,994 cfm
High-Efficiency MotorNo High-Efficiency Motor
Includes Drive PackageDrive Package Included
Mounting LocationRoof
Exhaust Airflow @ 0.500 in SP1,490 cfm
Housing MaterialAluminum
Motor EnclosureOpen Dripproof
Overall Diameter28 3/8 in
Overall Length28 3/8 in
Airflow @ 0.000 in SP1,994 cfm
Base Height1 3/4 in
Brake Horsepower13/50 hp
Current6.2/2.8 to 3.1 A
Cutout Size26 in L x 26 in W
Electrical ConnectionPower Cord
Exhaust Airflow @ 0.250 in SP1,771 cfm
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 Length28.4 in
Housing Width28.4 in
Maximum Ambient Temperature180 Degrees F
Maximum Inlet Air Temperature180 Degrees F
Mounting OrientationVertical
Propeller Shaft Diameter3/4 in
Safety FeaturesBirdscreen, Windband
Spark Resistant Construction TypeA
Wheel TypeBackward Inclined
Drive TypeBelt Drive
Wheel Diameter14 3/4 in
Base Width26 in
Nameplate Voltage115/208 to 230V AC
Motor Horsepower1/4 hp
For High-Static Pressure ApplicationsNot For High-Static Pressure Applications
For Air TypeClean Air
Includes MotorMotor Included
Maximum Static Pressure5/8 in wc
Wheel MaterialAluminum
Number of Speeds1
StandardsAMCA Sound and Air, CSA, UL/cUL 705
Overall Height36 1/8 in
Overall Width28 3/8 in
ApplicationIndustrial and Commercial Buildings
Bearing TypeSealed Pillow Block
Compatible Curb Manufacturer Part Number2RB77, 2ZV83, 3C437, 4C454, 4HX40, 4HX48
Cutout Length26 in
Damper Size19 x 19 in
Exhaust Airflow @ 0.125 in SP1,882 cfm
Exhaust Airflow @ 0.375 in SP1,647 cfm
Frequency60 Hz
Housing Material FabricationSpun
IncludesNEMA 1 Junction Box
Maximum Fan Speed1,075 RPM
Motor Speed1,725 RPM
Mount TypeRoof Curb
Resistance PropertiesWeather Resistant
Sound Level10.0 sones @ 0.000 in SP and 5 ft, 7.8 sones @ 0.625 in SP and 5 ft, 8.4 sones @ 0.500 in SP and 5 ft, 8.9 sones @ 0.375 in SP and 5 ft, 9.4 sones @ 0.250 in SP and 5 ft, 9.9 sones @ 0.125 in SP and 5 ft
Speed ControllableSpeed Not Controllable
Country of OriginUnited States
(subject to change)