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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Exhaust-Side Guards for Wall-Mount Exhaust Fans
Protect the exhaust side of your wall-mount exhaust fans from debris.
Overall | |||||||
|---|---|---|---|---|---|---|---|
| For Blade Dia. | Ht. | Wd. | Dp. | Material | Mounting Fasteners Included | Each | |
| 18" | 21 3/4" | 21 3/4" | 6" | Galvanized Steel | Yes | 00000000 | 0000000 |
Direct-Drive Downdraft Roof-Mount Exhaust Fans
Direct-drive fans have fewer moving parts than belt-drive fans for less maintenance. More economical than upblast roof-mount exhaust fans, these draw stagnant and humid air out through your roof and then direct it back toward the roof. All fans have a disconnect switch to turn off the power for servicing.
Fans with a brushless motor are more efficient than fans with a standard motor. They operate at a wide range of speeds for precise speed control and greater energy savings. They’re also quieter and have a longer lifespan because of their advanced electronic controls.
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 | Specifications Met | Each | Each | |||
Totally Enclosed Motor Enclosure—Brushless Motor | ||||||||||||||||
120V AC, Single Phase—Hardwire | ||||||||||||||||
| 2 | 14" | 1,900 cfm @ 1/2 in. of H₂O 2,300 cfm @ 0 in. of H₂O | 68 dBA @ 5 ft. | 1,525 | 1/2 | 29 3/4" | 21 3/4" | 21" | 61 | 120° | Aluminum | AMCA Certified, ETL Listed | 0000000 | 000000000 | 0000000 | 0000000 |
Open Dripproof Motor Enclosure | ||||||||||||||||
120V AC, Single Phase—Hardwire | ||||||||||||||||
| 2 | 14" | 1,800 cfm @ 1/2 in. of H₂O 2,100 cfm @ 0 in. of H₂O | 66 dBA @ 5 ft. | 1,625 | 1/2 | 29 3/4" | 21 3/4" | 21" | 56 | Not Rated | Aluminum | AMCA Certified, ETL Listed | 0000000 | 000000 | 0000000 | 000000 |