About Sound Levels
To choose an alarm or speaker that’s loud enough, first determine the decibel (dB) rating of background noise.
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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 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.
Fans with a brushless motor have advanced electronic controls that allow them to precisely operate at wide range of speeds, making them more efficient, quieter, and longer lasting than fans with a standard motor.
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 | ||||||||||||||||
120V AC, Single Phase—Hardwire | ||||||||||||||||
| 1 | 9" | 300 cfm @ 1/2 in. of H₂O 400 cfm @ 0 in. of H₂O | 54 dBA @ 5 ft. | 1,300 | 1/32 | 17 3/4" | 14 1/2" | 19" | 40 | 120° | Aluminum | AMCA Certified, ETL Listed | 0000000 | 0000000 | 0000000 | 0000000 |
| 1 | 11" | 400 cfm @ 1/2 in. of H₂O 710 cfm @ 0 in. of H₂O | 60 dBA @ 5 ft. | 1,625 | 3/16 | 22" | 18" | 19" | 43 | 300° | Aluminum | AMCA Certified, ETL Listed | 0000000 | 000000 | 0000000 | 000000 |
| 1 | 11 3/4" | 750 cfm @ 1/2 in. of H₂O 1,050 cfm @ 0 in. of H₂O | 59 dBA @ 5 ft. | 1,300 | 1/4 | 25 1/2" | 25 1/4" | 21" | 67 | 300° | Aluminum | AMCA Certified, ETL Listed | 0000000 | 000000 | 0000000 | 000000 |
| 1 | 12" | 1,100 cfm @ 1/2 in. of H₂O 1,300 cfm @ 0 in. of H₂O | 68 dBA @ 5 ft. | 1,625 | 1/3 | 25 1/2" | 25 1/4" | 21" | 50 | 300° | Aluminum | AMCA Certified, ETL Listed | 0000000 | 000000 | 0000000 | 000000 |
| 1 | 13 3/4" | 1,500 cfm @ 1/2 in. of H₂O 1,950 cfm @ 0 in. of H₂O | 68 dBA @ 5 ft. | 1,475 | 1/2 | 28 7/8" | 27 1/4" | 21" | 78 | 300° | Aluminum | AMCA Certified, ETL Listed | 0000000 | 000000 | 0000000 | 000000 |
| 1 | 16" | 2,450 cfm @ 1/2 in. of H₂O 2,900 cfm @ 0 in. of H₂O | 69 dBA @ 5 ft. | 1,625 | 3/4 | 31 7/8" | 30 1/2" | 24 3/4" | 80 | 300° | Aluminum | AMCA Certified, ETL Listed | 0000000 | 00000000 | 0000000 | 000000 |
208-230V AC, Three Phase—Hardwire | ||||||||||||||||
| 1 | 18 3/4" | 3,750 cfm @ 1/2 in. of H₂O 4,100 cfm @ 0 in. of H₂O | 68 dB @ 5 ft. | 1,150 | 2 | 37 3/8" | 33 3/4" | 28" | 184 | 300° | Aluminum | AMCA Certified, ETL Listed | 0000000 | 00000000 | 0000000 | 000000 |
| 1 | 20 3/4" | 5,900 cfm @ 1/2 in. of H₂O 6,450 cfm @ 0 in. of H₂O | 85 dBA @ 5 ft. | 1,425 | 5 | 37 3/8" | 33 1/4" | 28" | 221 | 300° | Aluminum | AMCA Certified, ETL Listed | 0000000 | 00000000 | 0000000 | 000000 |
| 1 | 24" | 7,000 cfm @ 1/2 in. of H₂O 7,750 cfm @ 0 in. of H₂O | 72 dBA @ 5 ft. | 900 | 3 | 41 7/8" | 37 1/2" | 33" | 312 | 300° | Aluminum | AMCA Certified, ETL Listed | 0000000 | 00000000 | 0000000 | 000000 |
| 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 | 00000000 | 0000000 | 000000 |
Totally Enclosed Motor Enclosure—Brushless Motor | ||||||||||||||||
120V AC, Single Phase—Hardwire | ||||||||||||||||
| 1 | 11 3/4" | 1,050 cfm @ 1/2 in. of H₂O 1,300 cfm @ 0 in. of H₂O | 70 dBA @ 5 ft. | 1,575 | 1/3 | 25 1/2" | 25 1/4" | 21" | 64 | 300° | Aluminum | AMCA Certified, ETL Listed | 0000000 | 000000 | 0000000 | 000000 |
| 1 | 13 3/4" | 1,550 cfm @ 1/2 in. of H₂O 2,000 cfm @ 0 in. of H₂O | 69 dBA @ 5 ft. | 1,500 | 1/2 | 28 7/8" | 27 1/4" | 21" | 71 | 300° | Aluminum | AMCA Certified, ETL Listed | 0000000 | 00000000 | 0000000 | 000000 |
| 1 | 15 3/4" | 2,850 cfm @ 1/2 in. of H₂O 3,200 cfm @ 0 in. of H₂O | 72 dBA @ 5 ft. | 1,550 | 1 | 31 7/8" | 30 1/2" | 24 3/4" | 87 | 300° | Aluminum | AMCA Certified, ETL Listed | 0000000 | 00000000 | 0000000 | 000000 |
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.
Fans with a brushless motor are more efficient than fans with a standard motor. They operate at a wide range of speeds for precise speed control and greater energy savings. They’re also quieter and have a longer lifespan because of their advanced electronic controls.
Note: Airflow depends on the resistance created by ductwork. This resistance, known as static pressure (SP), is measured in inches of water.
For technical drawings and 3-D models, click on a part number.
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 | |||
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" | 21 | Not Rated | Aluminum | AMCA Certified, 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" | 30 | Not Rated | Aluminum | AMCA Certified, 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" | 39 | Not Rated | Aluminum | AMCA Certified, 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" | 60 | Not Rated | Aluminum | AMCA Certified, ETL Listed | 0000000 | 000000 | 0000000 | 000000 |
Totally Enclosed Motor Enclosure—Brushless Motor | ||||||||||||||||
120V AC, Single Phase—Hardwire | ||||||||||||||||
| 2 | 12" | 1,000 cfm @ 1/2 in. of H₂O 1,300 cfm @ 0 in. of H₂O | 66 dBA @ 5 ft. | 1,575 | 1/3 | 26 1/4" | 19 1/8" | 21" | 54 | 120° | Aluminum | AMCA Certified, ETL Listed | 0000000 | 000000 | 0000000 | 000000 |
| 2 | 14" | 1,900 cfm @ 1/2 in. of H₂O 2,300 cfm @ 0 in. of H₂O | 68 dBA @ 5 ft. | 1,525 | 1/2 | 29 3/4" | 21 3/4" | 21" | 61 | 120° | Aluminum | AMCA Certified, ETL Listed | 0000000 | 00000000 | 0000000 | 000000 |
| 2 | 16" | 2,850 cfm @ 1/2 in. of H₂O 3,300 cfm @ 0 in. of H₂O | 71 dBA @ 5 ft. | 1,525 | 1 | 33 1/4" | 23 3/8" | 24" | 74 | 120° | Aluminum | AMCA Certified, ETL Listed | 0000000 | 00000000 | 0000000 | 000000 |
Open Dripproof Motor Enclosure | ||||||||||||||||
120V AC, Single Phase—Hardwire | ||||||||||||||||
| 2 | 9" | 100 cfm @ 1/2 in. of H₂O 400 cfm @ 0 in. of H₂O | 50 dBA @ 5 ft. | 1,250 | 1/32 | 20 3/4" | 14 1/2" | 19" | 40 | 120° | Aluminum | AMCA Certified, ETL Listed | 0000000 | 000000 | 0000000 | 000000 |
| 2 | 11" | 600 cfm @ 1/2 in. of H₂O 800 cfm @ 0 in. of H₂O | 57 dBA @ 5 ft. | 1,625 | 3/16 | 23 3/4" | 16 1/4" | 19" | 37 | Not Rated | Aluminum | AMCA Certified, ETL Listed | 0000000 | 000000 | 0000000 | 000000 |
| 2 | 12" | 950 cfm @ 1/2 in. of H₂O 1,250 cfm @ 0 in. of H₂O | 62 dBA @ 5 ft. | 1,625 | 1/4 | 26 1/4" | 19 1/8" | 21" | 53 | Not Rated | Aluminum | AMCA Certified, ETL Listed | 0000000 | 000000 | 0000000 | 000000 |
| 2 | 14" | 1,800 cfm @ 1/2 in. of H₂O 2,100 cfm @ 0 in. of H₂O | 66 dBA @ 5 ft. | 1,625 | 1/2 | 29 3/4" | 21 3/4" | 21" | 56 | Not Rated | Aluminum | AMCA Certified, ETL Listed | 0000000 | 000000 | 0000000 | 000000 |
| 2 | 16" | 2,600 cfm @ 1/2 in. of H₂O 3,100 cfm @ 0 in. of H₂O | 70 dBA @ 5 ft. | 1,450 | 3/4 | 33 1/4" | 23 3/8" | 24" | 77 | 120° | Aluminum | AMCA Certified, ETL Listed | 0000000 | 000000 | 0000000 | 000000 |
208/230V AC, Three Phase—Hardwire | ||||||||||||||||
| 3 | 19" | 4,500 cfm @ 1/2 in. of H₂O 5,000 cfm @ 0 in. of H₂O | 75 dBA @ 5 ft. | 1,300 | 2 | 38 15/16" | 32 3/4" | 28" | 189 | 120° | Aluminum | AMCA Certified, ETL Listed | 0000000 | 00000000 | 0000000 | 000000 |
| 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 | 00000000 | 0000000 | 000000 |
| 3 | 24" | 8,100 cfm @ 1/2 in. of H₂O 9,000 cfm @ 0 in. of H₂O | 73 dBA @ 5 ft. | 925 | 3 | 43 7/16" | 37 1/4" | 33" | 288 | 120° | Aluminum | AMCA Certified, ETL Listed | 0000000 | 00000000 | 0000000 | 000000 |
| 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 | 00000000 | 0000000 | 000000 |
| 3 | 36" | 11,000 cfm @ 1/2 in. of H₂O 13,500 cfm @ 0 in. of H₂O | 64 dBA @ 5 ft. | 450 | 5 | 63 5/16" | 49 1/2" | 44" | 532 | 120° | Aluminum | AMCA Certified, ETL Listed | 0000000 | 00000000 | 0000000 | 000000 |