System of Measurement System of Measurement |
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Base Width Base Width |
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Mounting Location Mounting Location |
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Electrical Phase Electrical Phase |
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Blade Diameter Blade Diameter |
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Power Power |
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Draft Direction Draft Direction |
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Voltage Voltage |
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Base Diameter Base Diameter |
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Airflow Airflow |
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Drive Type Drive Type |
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DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement)  |
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RoHS (Restriction of Hazardous Substances) RoHS (Restriction ofHazardous Substances) |
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Volume Volume |
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Overall Height Overall Height | Show |
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Overall Height Overall Height | Hide |
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Overall Diameter Overall Diameter |
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Ambient Temperature Ambient Temperature |
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Housing Material Housing Material |
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Motor Enclosure Type Motor Enclosure Type |
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Motor Speed Motor Speed |
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Number of Speeds Number of Speeds |
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Weight Weight |
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Blade Material Blade Material |
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About Sound Levels
Measured in decibels (dB), volume ratings indicate how much noise equipment makes. Some common volume levels include a whisper @ 20 dB, a refrigerator @ 40 dB, a conversation @ 60 dB, and a light machine shop @ 90 dB. OSHA recommends hearing protection for exposure to 80 dB and greater.
About Exhaust Fans
More
Direct-Drive Upblast Roof-Mount Exhaust Fans
Direct-drive fans have fewer moving parts than belt-drive fans for less maintenance. These exhaust fans draw stagnant and humid air out through your roof and then expel it up and away from the roof surface. All fans have a disconnect switch to turn off the power for servicing.
Note: Airflow depends on the resistance created by ductwork. This resistance, known as static pressure (SP), is measured in inches of water.
For technical drawings and 3-D models, click on a part number.
Fans | |||||||||||||||
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Overall | Mounting Bases | ||||||||||||||
| Blade Dia. | Airflow @ Static Pressure | Volume | Motor Speed, rpm | Power, hp | Dia. | Ht. | Base Wd. | Wt., lbs. | Max. Ambient Temperature | Housing Material | Each | Each | |||
Totally Enclosed Motor Enclosure | |||||||||||||||
460V AC, Three Phase—Hardwire | |||||||||||||||
| 2 | 42" | 17,000 cfm @ 1/2 in. of H₂O 24,700 cfm @ 0 in. of H₂O | 75 dBA @ 15 ft. | 1,150 | 3 | 50" | 29 1/2" | 54" | 471 | 122° F | Steel | 0000000 | 000000000 | 0000000 | 0000000 |
Wind-Driven Roof-Mount Exhaust Fans
Designed to spin freely with the slightest breeze, these fans create a vacuum that draws air out from buildings and ventilation systems—no electricity required. They are also known as turbine ventilators. Mount fans on your roof away from wind obstructions.
Optional mounting bases are sold separately.
All bases have a square bottom, round top, and flashing to simplify installation.
To Order: For slope bases, please specify pitch: 1/12-11/12 in increments of 1/12. To determine pitch, use an angle indicator or divide rise by run (see illustration). For instance, if your roof rises 5" in 12" of horizontal space, your pitch is 5/12.