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
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Wall-Mount Office Fans
Keep cool with these personal-size wall-mount fans. The fan head tilts to direct air where it's needed.
Overall | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Blade Dia. | Airflow, cfm | No. of Speeds | Current, A  | Ht. | Wd. | Dp. | Cord Lg., ft. | Blade Material | Guard Material | Mount. Fasteners Included | Mount. Hole Dia. | Specifications Met | Each | |
120V AC, Single Phase—Three Prong Plug | ||||||||||||||
Non-Oscillating, Tilting | ||||||||||||||
| 20" | 1,700 | 3 | 1.3 | 29 1/2" | 22" | 20 1/2" | 9 | Aluminum | Steel | No | 3/8" | UL Listed, C-UL Listed | 0000000 | 0000000 |
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.
Fans | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Overall | Mounting Bases | ||||||||||||||
| Blade Dia. | Airflow @ Static Pressure | Volume | Motor Speed, rpm | Power, hp | Dia. | Ht. | Base Wd. | Wt., lbs. | Max. Ambient Temp., °F | 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 @ 5 ft. | 1,150 | 3 | 50" | 29 1/2" | 54" | 471 | 120° | 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.