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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.
120V AC, Single Phase (Hardwire)—Totally Enclosed Motor Enclosure
Overall | Mounting Hole | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Blade Dia. | Airflow, cfm | Volume | Motor Speed, rpm | No. of Speeds | Power, hp | Ht. | Wd. | Dp. | Blade Material | Guard Material | Dia. | Location | No. of | Each | |
| 27 7/8" | 3,900 | 67 dBA @ 5 ft. | 1,125 | 2 | 1/4 | 35 1/4" | 35 1/4" | 8 1/2" | Aluminum | Steel | 1/4" | Guard | 4 | 0000000 | 0000000 |