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.
Belt-Drive Mobile Floor Fans
Belt-drive fans are quieter and have a longer life span than direct-drive fans because components can be replaced if worn or damaged.
Fans with an open dripproof motor enclosure are for relatively clean, dry, indoor locations.
Overall | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Blade Dia. | Airflow, cfm | Volume | Motor Speed, rpm | No. of Speeds | Power, hp | Current, A | Ht. | Wd. | Dp. | Cord Lg., ft. | Blade Material | Guard Material | Each | |
Open Dripproof Motor Enclosure—Aluminum Housing | ||||||||||||||
120V AC, Single Phase—Three Prong Plug | ||||||||||||||
| 42" | 14,400 | Not Rated | 475 | 2 | 3/4 | 9.1 | 44" | 46" | 22" | 10 | Steel | Powder-Coated Steel | 0000000 | 000000000 |
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 | 30" | 9,500 cfm @ 1/2 in. of H₂O 10,500 cfm @ 0 in. of H₂O | 71 dBA @ 5 ft. | 725 | 5 | 51 1/4" | 44" | 40" | 497 | 300° | Aluminum | AMCA Certified, ETL Listed | 0000000 | 000000000 | 0000000 | 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.
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 | ||||||||||||||||
| 3 | 30" | 10,400 cfm @ 1/2 in. of H₂O 11,500 cfm @ 0 in. of H₂O | 69 dBA @ 5 ft. | 700 | 5 | 52 13/16" | 44" | 40" | 467 | 120° | Aluminum | AMCA Certified, ETL Listed | 0000000 | 000000000 | 0000000 | 0000000 |