About Exhaust Fans
More
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 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 | 21" | 6,200 cfm @ 1/2 in. of H₂O 6,700 cfm @ 0 in. of H₂O | 82 dBA @ 5 ft. | 1,400 | 5 | 38 15/16" | 32 1/4" | 28" | 201 | 120° | Aluminum | AMCA Certified, ETL Listed | 0000000 | 000000000 | 0000000 | 0000000 |
Direct-Drive Exhaust Fans
With fewer moving parts than belt-drive fans, these direct-drive exhaust fans require less maintenance. They have a built-in grease pan to collect waste while cooking. Mount these fans directly to your roof with the attached mounting brackets. They meet UL standards for ventilation in residential, commercial, and institutional kitchens.
| Blade Dia. | Airflow @ Static Pressure | Volume | Motor Speed, rpm | No. of Speeds | Power, hp | Overall Ht. | Base Wd. | Max. Ambient Temp., °F | Housing Material | Blade Material | Features | Specifications Met | Each | |
Open Dripproof Motor Enclosure | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
208V AC, Three Phase—Hardwire | ||||||||||||||
| 21" | 5,000 cfm @ 1/2 in. of H₂O 5,500 cfm @ 0 in. of H₂O | 77 dB @ 5 ft. | 1,275 | Variable | 3 | 71 7/8" | 38 1/4" | 350° | Steel | Aluminum | Grease Pan | UL 705, UL 762, ULC-S645, ETL Listed | 0000000 | 000000000 |