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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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.
Blowers
These blowers install in ductwork similar to duct fans, but are for use where high static pressures are present. Use them for equipment cooling, material conveying, drying, ventilating, and exhausting. All blowers have an open dripproof motor enclosure for relatively clean, dry, indoor locations.
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.
Blowers | ||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Outlet | Overall | Replacement Wheels | ||||||||||||||||
| Airflow @ Static Pressure | Volume | Motor Speed, rpm | Power, hp | Ht. | Wd. | Inlet Dia. | Wheel Dia. | Ht. | Wd. | Dp. | Wt., lbs. | Temp. Range, °F | Mount. Fasteners Included | Mount. Hole Dia. | Each | Each | ||
With Rectangular Outlet and Round Inlet—Open Dripproof Motor Enclosure | ||||||||||||||||||
120/230V AC, Single Phase—Hardwire | ||||||||||||||||||
| 1,500 cfm @ 3/4 in. of H₂O 1,800 cfm @ 1/4 in. of H₂O | 55 dBA @ 15 ft. | 1,150 | 3/4 | 11 3/4" | 8" | 10" | 10 5/8" | 22 1/2" | 18 7/8" | 17 1/4" | 84 | -15° to 180° | No | 3/8" | 0000000 | 000000000 | 0000000 | 0000000 |
230/460V AC, Three Phase—Hardwire | ||||||||||||||||||
| 1,500 cfm @ 3/4 in. of H₂O 1,800 cfm @ 1/4 in. of H₂O | 55 dBA @ 15 ft. | 1,150 | 3/4 | 11 3/4" | 8" | 10" | 10 5/8" | 22 1/2" | 18 7/8" | 17 1/4" | 67 | -15° to 180° | No | 3/8" | 0000000 | 00000000 | 0000000 | 000000 |