About Sound Levels
To choose an alarm or speaker that’s loud enough, first determine the decibel (dB) rating of background noise.
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About Exhaust Fans
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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.
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 | |
| 30" | 33 3/4" | 33 3/4" | 6" | Galvanized Steel | Yes | 00000000 | 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 | Specifications Met | Each | Each | |||
Open Dripproof Motor Enclosure | ||||||||||||||||
208-230V AC, Three Phase—Hardwire | ||||||||||||||||
| 1 | 18 3/4" | 3,750 cfm @ 1/2 in. of H₂O 4,100 cfm @ 0 in. of H₂O | 68 dB @ 5 ft. | 1,150 | 2 | 37 3/8" | 33 3/4" | 28" | 184 | 300° | Aluminum | AMCA Certified, ETL Listed | 0000000 | 000000000 | 0000000 | 0000000 |
High-Output Blowers
Powerful and durable, these blowers are able to blow air through larger systems that have more airflow resistance than standard blowers can handle. They install in ductwork similar to duct fans, but are for use where high static pressures are present. Use them for equipment cooling, drying, ventilating, and exhausting. Blowers with a totally enclosed motor enclosure can be used in dirty, dusty, and damp environments.
Note: Airflow depends on the resistance created by ductwork. This resistance, known as static pressure (SP), is measured in inches of water. It is the responsibility of users in California to follow local energy efficiency regulations. Operating these blowers at a high airflow may violate these regulations.
High-Output 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 | Each | Each | ||
Totally Enclosed Motor Enclosure | ||||||||||||||||
230/460V AC, Three Phase—Hardwire | ||||||||||||||||
| 6,000 cfm @ 5 in. of H₂O 6,325 cfm @ 3 in. of H₂O | 70 dBA @ 15 ft. | 3,450 | 15 | 11" | 18 7/16" | 18" | 17 13/16" | 33 3/4" | 29 13/16" | 38 1/4" | 596 | -15° to 180° | 0000000 | 000000000 | 00000000 | 000000000 |