Airflow @ Static Pressure Airflow @ Static Pressure |
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Motor Enclosure Type Motor Enclosure Type |
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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.
About Exhaust Fans
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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. | Housing Material | Specifications Met | Each | Each | |||
Totally Enclosed Motor Enclosure | ||||||||||||||
120V AC, Single Phase—Hardwire | ||||||||||||||
| 1 | 10" | 60 cfm @ 1/2 in. of H₂O 500 cfm @ 0 in. of H₂O | Not Rated | 1,500 | 1/30 | 18 5/16" | 11 1/4" | 19" | Aluminum | ETL Listed | 0000000 | 0000000 | 0000000 | 0000000 |
| 1 | 12" | 430 cfm @ 1/2 in. of H₂O 830 cfm @ 0 in. of H₂O | Not Rated | 1,500 | 1/10 | 20 5/16" | 11 3/4" | 19" | Aluminum | ETL Listed | 0000000 | 000000 | 0000000 | 000000 |
| 1 | 14" | 520 cfm @ 1/2 in. of H₂O 1,100 cfm @ 0 in. of H₂O | Not Rated | 1,100 | 1/6 | 27 5/16" | 14 5/8" | 21" | Aluminum | ETL Listed | 0000000 | 000000 | 0000000 | 000000 |
| 1 | 18" | 1,200 cfm @ 1/2 in. of H₂O 2,400 cfm @ 0 in. of H₂O | Not Rated | 1,100 | 1/3 | 33 9/16" | 16 3/8" | 26" | Aluminum | ETL Listed | 0000000 | 000000 | 0000000 | 000000 |
Open Dripproof Motor Enclosure | ||||||||||||||
120V AC, Single Phase—Hardwire | ||||||||||||||
| 2 | 11" | 600 cfm @ 1/2 in. of H₂O 800 cfm @ 0 in. of H₂O | 37 dB @ 15 ft. | 1,625 | 3/16 | 23 3/4" | 16 1/4" | 19" | Aluminum | ETL Listed | 0000000 | 000000 | 0000000 | 000000 |
| 2 | 12" | 950 cfm @ 1/2 in. of H₂O 1,250 cfm @ 0 in. of H₂O | 41 dB @ 15 ft. | 1,625 | 1/4 | 26 1/4" | 19 1/8" | 21" | Aluminum | ETL Listed | 0000000 | 000000 | 0000000 | 000000 |
| 2 | 14" | 2,100 cfm @ 0 in. of H₂O 1,800 cfm @ 1/2 in. of H₂O | 45 dB @ 15 ft. | 1,625 | 1/2 | 29 3/4" | 21 3/4" | 21" | Aluminum | ETL Listed | 0000000 | 000000 | 0000000 | 000000 |
Belt-Drive Downdraft Roof-Mount Exhaust 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. 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. | Housing Material | Specifications Met | Each | Each | ||
Open Dripproof Motor Enclosure | |||||||||||||
120/208-230V AC, Single Phase—Hardwire | |||||||||||||
| 16" | 2,400 cfm @ 1/2 in. of H₂O 3,000 cfm @ 0 in. of H₂O | 43 dB @ 15 ft. | 1,175 | 1/2 | 33 1/4" | 30 5/8" | 24 3/4" | Aluminum | ETL Listed | 0000000 | 0000000 | 0000000 | 0000000 |
| 21" | 4,500 cfm @ 1/2 in. of H₂O 5,200 cfm @ 0 in. of H₂O | 46 dB @ 15 ft. | 900 | 1 | 38 1/4" | 32 3/4" | 28" | Aluminum | ETL Listed | 0000000 | 00000000 | 0000000 | 000000 |
208-230/460V AC, Three Phase—Hardwire | |||||||||||||
| 25" | 6,500 cfm @ 1/2 in. of H₂O 7,300 cfm @ 0 in. of H₂O | 48 dB @ 15 ft. | 775 | 1 1/2 | 42 1/2" | 37 3/4" | 33" | Aluminum | ETL Listed | 0000000 | 00000000 | 0000000 | 000000 |