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.
Direct-Drive Wall-Mount Exhaust Fans
Direct-drive fans have fewer moving parts than belt-drive fans for less maintenance. Use these fans to draw stagnant and humid air out of a room or area.
Fans with an open dripproof motor enclosure are for relatively clean, dry, indoor locations. Use a collar (sold separately) to connect these fans to a louver.
Fans | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Overall | Collars | ||||||||||||||
| Blade Dia. | Airflow, cfm | Volume | Motor Speed, rpm | No. of Speeds | Power, hp | Ht. | Wd. | Dp. | Frame Material | Blade Material | Specifications Met | Each | Each | ||
| 18" | 4,200 | 69 dBA @ 5 ft. | 1,550 | 1 | 3/4 | 24 1/8" | 24 1/8" | 11 3/4" | Powder-Coated Steel | Aluminum | UL Listed, C-UL Listed | 0000000 | 0000000 | 0000000 | 0000000 |
| 20" | 4,100 | 64 dBA @ 5 ft. | 1,075 | 1 | 1/2 | 24 1/8" | 24 1/8" | 10 5/8" | Powder-Coated Steel | Aluminum | UL Listed, C-UL Listed | 0000000 | 000000 | 0000000 | 000000 |
Hazardous Location Exhaust Fans
These fans have a motor that is UL listed for hazardous environments. Use them to draw stagnant and humid air out of a room or area.
Direct-drive fans have fewer moving parts than belt-drive fans for less maintenance. Add a collar (sold separately) to connect a wall-mount fan these fans to a louver.
Fans | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Overall | Collars | |||||||||||||||
| Blade Dia. | Airflow, cfm | Volume | Drive Type | Motor Speed, rpm | No. of Speeds | Power, hp | Ht. | Wd. | Dp. | Housing Material | Blade Material | Environmental Rating | Each | Each | ||
120/230V AC, Single Phase—Hardwire | ||||||||||||||||
| 20" | 4,800 | 73 dBA @ 5 ft. | Direct | 1,725 | 1 | 1/2 | 24 1/8" | 24 1/8" | 19 1/2" | Steel | Aluminum | NEC Class I Divisions 1, 2 Group D; NEC Class II Divisions 1, 2 Groups F, G | 0000000 | 000000000 | 0000000 | 0000000 |
230/460V AC, Three Phase—Hardwire | ||||||||||||||||
| 20" | 4,800 | 73 dBA @ 5 ft. | Direct | 1,725 | 1 | 1/2 | 24 1/8" | 24 1/8" | 19 1/2" | Steel | Aluminum | NEC Class I Divisions 1, 2 Group D; NEC Class II Divisions 1, 2 Groups F, G | 0000000 | 00000000 | 0000000 | 000000 |