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.
Heater and Air Conditioner Duct Booster Fans
Insert these fans directly into your ductwork. They give small heaters and air conditioners a boost to circulate air through ductwork. The crimped end construction makes inserting the fans easy.
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.
| For Duct Dia. | No. of Speeds | Airflow @ Static Pressure | Volume | Motor Speed, rpm | Overall Dp. | Max. Temp., °F | Housing Material | Blade Material | Each | |
120V AC, Single Phase—Plug | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 4" | 1 | 65 cfm @ 0 in. of H₂O | 47 dBA | 3,200 | 6" | 140° | Galvanized Steel | Polycarbonate Plastic | 0000000 | 000000 |
| 12" | 1 | 650 cfm @ 0 in. of H₂O | 50 dBA | 1,300 | 8" | 140° | Galvanized Steel | Polycarbonate Plastic | 0000000 | 00000 |
120V AC, Single Phase—Hardwire | ||||||||||
| 6" | 1 | 240 cfm @ 0 in. of H₂O | Not Rated | 1,600 | 7 1/4" | 255° | Galvanized Steel | Aluminum | 0000000 | 00000 |
| 8" | 1 | 420 cfm @ 0 in. of H₂O | Not Rated | 1,600 | 7 1/4" | 255° | Galvanized Steel | Aluminum | 0000000 | 00000 |
| 10" | 1 | 650 cfm @ 0 in. of H₂O | Not Rated | 1,600 | 8" | 212° | Galvanized Steel | Aluminum | 0000000 | 00000 |
| 14" | 1 | 1,350 cfm @ 0 in. of H₂O | Not Rated | 1,600 | 9 1/8" | 212° | Galvanized Steel | Aluminum | 0000000 | 000000 |
Direct-Drive Duct Fans
Direct-drive fans have fewer moving parts than belt-drive fans for less maintenance. Also known as axial duct fans, these install inline in ductwork for use as an exhaust, supply, or booster fan. All fans have a totally enclosed motor enclosure, which can be used in dirty, dusty, and damp environments.
Note: Airflow depends on the resistance created by ductwork. This resistance, known as static pressure (SP), is measured in inches of water.
Overall | Mounting | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| For Duct Dia. | Airflow @ Static Pressure | Motor Speed, rpm | Power, hp | Dia. | Ht. | Dp. | Max. Temp., °F | Housing Material | Blade Material | Specifications Met | Hardware Included | Hole Diameter | Each | |
120V AC, Single Phase—Hardwire | ||||||||||||||
| 4" | 95 cfm @ 3/8 in. of H₂O 135 cfm @ 1/8 in. of H₂O | 3,050 | 1/40 | 9 1/2" | 9 1/2" | 9 5/8" | 140° | ABS/Polycarbonate Plastic | Nylon Plastic | C-UL Listed, UL Listed | Yes | 1/4" | 00000000 | 0000000 |
| 4" | 143 cfm @ 3/8 in. of H₂O 168 cfm @ 1/8 in. of H₂O | 2,450 | 1/9 | 10" | 10 1/2" | 10 9/16" | 140° | ABS/Polycarbonate Plastic | Nylon Plastic | C-UL Listed, UL Listed | Yes | 1/4" | 000000000 | 000000 |
| 5" | 105 cfm @ 3/8 in. of H₂O 150 cfm @ 1/8 in. of H₂O | 3,050 | 1/40 | 9 1/2" | 9 1/2" | 7 7/8" | 140° | ABS/Polycarbonate Plastic | Nylon Plastic | C-UL Listed, UL Listed | Yes | 1/4" | 00000000 | 000000 |
| 6" | 201 cfm @ 3/8 in. of H₂O 255 cfm @ 1/8 in. of H₂O | 2,450 | 1/12 | 11 5/8" | 12 1/8" | 9 7/32" | 140° | ABS/Polycarbonate Plastic | Nylon Plastic | C-UL Listed, UL Listed | Yes | 1/4" | 000000000 | 000000 |
| 6" | 250 cfm @ 3/8 in. of H₂O 300 cfm @ 1/8 in. of H₂O | 2,450 | 1/10 | 11 3/4" | 11 3/4" | 9 5/8" | 140° | ABS/Polycarbonate Plastic | Nylon Plastic | C-UL Listed, UL Listed | Yes | 1/4" | 00000000 | 000000 |
| 6" | 250 cfm @ 3/8 in. of H₂O 308 cfm @ 1/8 in. of H₂O | 2,150 | 1/6 | 11 5/8" | 12 1/8" | 9 7/32" | 140° | ABS/Polycarbonate Plastic | Nylon Plastic | C-UL Listed, UL Listed | Yes | 1/4" | 000000000 | 000000 |
High-Output Direct-Drive Duct Fans
Produce three times the airflow as standard direct-drive duct fans. All of these direct-drive fans have fewer moving parts than belt-drive fans for less maintenance. Also known as axial duct fans, they install inline in ductwork for use as an exhaust, supply, or booster fan. All have a TEFC (totally enclosed fan cooled) motor enclosure, which can be used in dirty, dusty, and damp environments.
Note: Airflow depends on the resistance created by ductwork. This resistance, known as static pressure (SP), is measured in inches of water.
Overall | Mounting | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| For Duct Dia. | Airflow @ Static Pressure | Volume | Motor Speed, rpm | Power, hp | Dia. | Ht. | Dp. | Bolt Circle Dia. | Max. Temp., °F | Housing Material | Blade Material | Fasteners Included | For Screw Size | Hole Dia. | No. of Holes | Each | |
120/230V AC, Single Phase—Hardwire | |||||||||||||||||
| 12" | 1,900 cfm @ 3/8 in. of H₂O 2,000 cfm @ 1/8 in. of H₂O | 70 dBA @ 15 ft. | 3,450 | 1/2 | 14 1/16" | 14 1/16" | 20" | 13 1/8" | 100° | Steel | Aluminum | No | 3/8" | 7/16" | 8 | 0000000 | 000000000 |
| 15" | 2,100 cfm @ 3/8 in. of H₂O 2,700 cfm @ 1/8 in. of H₂O | 60 dBA @ 15 ft. | 1,750 | 1/2 | 17 1/16" | 17 1/16" | 20" | 16 1/8" | 100° | Steel | Aluminum | No | 3/8" | 7/16" | 8 | 0000000 | 00000000 |
| 18" | 3,900 cfm @ 3/8 in. of H₂O 4,500 cfm @ 1/8 in. of H₂O | 65 dBA @ 15 ft. | 1,750 | 3/4 | 20 1/16" | 20 1/16" | 20" | 19 1/8" | 100° | Steel | Aluminum | No | 3/8" | 7/16" | 8 | 0000000 | 00000000 |
| 24" | 4,900 cfm @ 3/8 in. of H₂O 5,800 cfm @ 1/8 in. of H₂O | 65 dBA @ 15 ft. | 1,750 | 3/4 | 26 11/16" | 26 11/16" | 21" | 25 13/16" | 100° | Steel | Aluminum | No | 3/8" | 7/16" | 8 | 0000000 | 00000000 |
Belt-Drive Duct 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. Also known as axial duct fans, these install inline in ductwork for use as an exhaust, supply, or booster fan. All fans have a totally enclosed motor enclosure, which can be used in dirty, dusty, and damp environments.
Note: Airflow depends on the resistance created by ductwork. This resistance, known as static pressure (SP), is measured in inches of water.
Overall | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| For Duct Dia. | Airflow @ Static Pressure | Volume | Motor Speed, rpm | Power, hp | Dia. | Ht. | Dp. | Max. Temp., °F | Housing Material | Blade Material | Mounting Fasteners Included | Mounting Hole Dia. | Each | |
120/230V AC, Single Phase—Hardwire | ||||||||||||||
| 12" | 1,400 cfm @ 3/8 in. of H₂O 1,600 cfm @ 1/8 in. of H₂O | 65 dBA @ 15 ft. | 3,450 | 1/2 | 14 1/16" | 23 7/16" | 12" | 175° | Steel | Aluminum | No | 7/16" | 0000000 | 000000000 |
| 15" | 2,800 cfm @ 3/8 in. of H₂O 3,200 cfm @ 1/8 in. of H₂O | 65 dBA @ 15 ft. | 2,275 | 3/4 | 17 1/16" | 26 15/16" | 12" | 175° | Steel | Aluminum | No | 7/16" | 0000000 | 00000000 |
| 18" | 2,500 cfm @ 3/8 in. of H₂O 3,400 cfm @ 1/8 in. of H₂O | 60 dBA @ 15 ft. | 1,600 | 1/2 | 20 1/16" | 30 3/16" | 12" | 175° | Steel | Aluminum | No | 7/16" | 0000000 | 00000000 |
Direct-Drive Corrosion-Resistant Duct Fans
A galvanized steel housing offers good corrosion resistance. All of these direct-drive fans have fewer moving parts than belt-drive fans for less maintenance. Also known as axial duct fans, they install inline in ductwork for use as an exhaust, supply, or booster fan. The fans have a totally enclosed motor enclosure, which can be used in dirty, dusty, and damp environments.
Note: Airflow depends on the resistance created by ductwork. This resistance, known as static pressure (SP), is measured in inches of water.
Overall | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| For Duct Dia. | Airflow @ Static Pressure | Motor Speed, rpm | Power, hp | Dia. | Ht. | Dp. | Max. Temp., °F | Housing Material | Blade Material | Specifications Met | Each | |
120V AC, Single Phase—Hardwire | ||||||||||||
| 4" | 90 cfm @ 3/8 in. of H₂O 115 cfm @ 1/8 in. of H₂O | 3,000 | 1/40 | 8 3/4" | 10 3/4" | 6 1/2" | 140° | Galvanized Steel | Polypropylene Plastic | C-UL Listed, UL Listed | 0000000 | 0000000 |
| 5" | 105 cfm @ 3/8 in. of H₂O 135 cfm @ 1/8 in. of H₂O | 3,000 | 1/40 | 8 3/4" | 10 3/4" | 5 1/2" | 140° | Galvanized Steel | Polypropylene Plastic | C-UL Listed, UL Listed | 0000000 | 000000 |
| 6" | 240 cfm @ 3/8 in. of H₂O 280 cfm @ 1/8 in. of H₂O | 2,700 | 1/10 | 11 3/8" | 13 3/8" | 6" | 140° | Galvanized Steel | Polypropylene Plastic | C-UL Listed, UL Listed | 0000000 | 000000 |
| 8" | 360 cfm @ 3/8 in. of H₂O 425 cfm @ 1/8 in. of H₂O | 2,550 | 1/6 | 13 3/8" | 15 3/8" | 6" | 140° | Galvanized Steel | Polypropylene Plastic | C-UL Listed, UL Listed | 0000000 | 000000 |
| 8" | 435 cfm @ 3/8 in. of H₂O 480 cfm @ 1/8 in. of H₂O | 2,950 | 1/5 | 13 3/8" | 15 3/8" | 6" | 140° | Galvanized Steel | Polypropylene Plastic | C-UL Listed, UL Listed | 0000000 | 000000 |
| 10" | 540 cfm @ 3/8 in. of H₂O 570 cfm @ 1/8 in. of H₂O | 3,100 | 1/4 | 13 3/8" | 15 3/8" | 5 7/8" | 140° | Galvanized Steel | Polypropylene Plastic | C-UL Listed, UL Listed | 0000000 | 000000 |
| 12" | 620 cfm @ 3/8 in. of H₂O 700 cfm @ 1/8 in. of H₂O | 2,600 | 1/4 | 16" | 18" | 8 1/4" | 140° | Galvanized Steel | Polypropylene Plastic | C-UL Listed, UL Listed | 0000000 | 000000 |
120V AC, Single Phase—Plug | ||||||||||||
| 4" | 90 cfm @ 3/8 in. of H₂O 115 cfm @ 1/8 in. of H₂O | 3,000 | 1/40 | 8 3/4" | 10 3/4" | 6 1/2" | 140° | Galvanized Steel | Polypropylene Plastic | C-UL Listed, UL Listed | 0000000 | 000000 |
| 5" | 105 cfm @ 3/8 in. of H₂O 135 cfm @ 1/8 in. of H₂O | 3,000 | 1/40 | 8 3/4" | 10 3/4" | 5 1/2" | 140° | Galvanized Steel | Polypropylene Plastic | C-UL Listed, UL Listed | 0000000 | 000000 |
| 8" | 360 cfm @ 3/8 in. of H₂O 425 cfm @ 1/8 in. of H₂O | 2,550 | 1/6 | 13 3/8" | 15 3/8" | 6" | 140° | Galvanized Steel | Polypropylene Plastic | C-UL Listed, UL Listed | 0000000 | 000000 |
| 8" | 435 cfm @ 3/8 in. of H₂O 480 cfm @ 1/8 in. of H₂O | 2,950 | 1/5 | 13 3/8" | 15 3/8" | 6" | 140° | Galvanized Steel | Polypropylene Plastic | C-UL Listed, UL Listed | 0000000 | 000000 |
| 10" | 540 cfm @ 3/8 in. of H₂O 570 cfm @ 1/8 in. of H₂O | 3,100 | 1/4 | 13 3/8" | 15 3/8" | 5 7/8" | 140° | Galvanized Steel | Polypropylene Plastic | C-UL Listed, UL Listed | 0000000 | 000000 |
Direct-Drive Hazardous Location Duct Fans
These fans have an explosion-proof motor that is UL listed for Class I, Divisions 1 and 2, Group D; and Class II, Divisions 1 and 2, Groups F and G hazardous environments. All are direct-drive fans that have fewer moving parts than belt-drive fans for less maintenance. Also known as axial duct fans, they install inline in ductwork for use as an exhaust, supply, or booster fan. The fans have a TEFC (totally enclosed fan cooled) motor enclosure, which can be used in dirty, dusty, and damp environments.
Note: Airflow depends on the resistance created by ductwork. This resistance, known as static pressure (SP), is measured in inches of water.
Overall | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| For Duct Dia. | Airflow @ Static Pressure | Volume | Motor Speed, rpm | Power, hp | Dia. | Ht. | Dp. | Max.Temp., °F | Housing Material | Blade Material | Mounting Fasteners Included | Mounting Hole Dia. | Each | |
120/230V AC, Single Phase—Hardwire | ||||||||||||||
| 12" | 1,900 cfm @ 3/8 in. of H₂O 2,000 cfm @ 1/8 in. of H₂O | 70 dBA @ 15 ft. | 3,450 | 1/2 | 14 1/16" | 14 1/16" | 20" | 100° | Steel | Aluminum | No | 7/16" | 0000000 | 000000000 |
| 15" | 2,100 cfm @ 3/8 in. of H₂O 2,700 cfm @ 1/8 in. of H₂O | 60 dBA @ 15 ft. | 1,750 | 1/2 | 17 1/16" | 17 1/16" | 20" | 100° | Steel | Aluminum | No | 7/16" | 0000000 | 00000000 |
| 18" | 3,900 cfm @ 3/8 in. of H₂O 4,500 cfm @ 1/8 in. of H₂O | 65 dBA @ 15 ft. | 1,750 | 3/4 | 20 1/16" | 20 1/16" | 20" | 100° | Steel | Aluminum | No | 7/16" | 0000000 | 00000000 |
| 24" | 4,900 cfm @ 3/8 in. of H₂O 5,800 cfm @ 1/8 in. of H₂O | 65 dBA @ 15 ft. | 1,750 | 3/4 | 26 11/16" | 26 11/16" | 21" | 100° | Steel | Aluminum | No | 7/16" | 0000000 | 00000000 |
Belt-Drive Hazardous Location Duct Fans
These fans have an explosion-proof motor that is rated for hazardous environments. All are belt-drive fans that are quieter and have a longer life span than direct-drive fans because components can be replaced if worn or damaged. They install inline in ductwork for use as an exhaust, supply, or booster fan. Fans rated IP44 have a motor enclosure that's rated for protection in damp environments. UL and CSA standards apply to the motor.
Note: Airflow depends on the resistance created by ductwork. This resistance, known as static pressure (SP), is measured in inches of water.
Overall | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| For Duct Dia. | Airflow @ Static Pressure | Volume | Motor Speed, rpm | Power, hp | Dia. | Ht. | Dp. | Max. Temp., °F | Housing Material | Blade Material | Mount. Fasteners Included | Mount. Hole Dia. | Each | |
120/230V AC, Single Phase—Hardwire | ||||||||||||||
| 12" | 1,400 cfm @ 3/8 in. of H₂O 1,600 cfm @ 1/8 in. of H₂O | 65 dBA @ 15 ft. | 3,025 | 1/2 | 14 1/16" | 23 7/16" | 12" | 175° | Steel | Aluminum | No | 7/16" | 0000000 | 000000000 |
| 15" | 2,800 cfm @ 3/8 in. of H₂O 3,200 cfm @ 1/8 in. of H₂O | 65 dBA @ 15 ft. | 2,275 | 3/4 | 17 1/16" | 26 15/16" | 12" | 175° | Steel | Aluminum | No | 7/16" | 0000000 | 00000000 |
| 18" | 2,500 cfm @ 3/8 in. of H₂O 3,400 cfm @ 1/8 in. of H₂O | 60 dBA @ 15 ft. | 1,600 | 1/2 | 20 1/16" | 30 3/16" | 12" | 175° | Steel | Aluminum | No | 7/16" | 0000000 | 00000000 |
Exterior-Wall-Mount Exhaust Fans
Good when you don't have room to mount an exhaust fan inside your facility, these fans attach to openings in outside walls. 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, so they’re easier to maintain. Belt-drive fans are quieter than direct-drive fans. They also last longer because their components can be replaced if damaged.
Fans with an open dripproof motor enclosure should be used in clean, dry, and indoor locations. You can use these fans with or without duct. To use them with duct, you'll need an angle ring (not included). Fans with a totally enclosed motor enclosure can be used in dirty, dusty, and damp environments. They mount through the wall, so you'll need to cut a hole on the inside of the wall as well.
Note: Airflow depends on the resistance created by louvers, filters, and ductwork in your system. This resistance, known as static pressure (SP), is measured in inches of water.
Grilles (sold separately) have fixed blades.
Louvers are gravity operated. The blades open when air flows and close when it stops, preventing backdrafts.
For technical drawings and 3-D models, click on a part number.
Fans | |||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
For Opening | Overall | Grilles | Louvers | ||||||||||||||
| Blade Dia. | Airflow @ Static Pressure | Drive Type | Motor Speed, rpm | Power, hp | Dia. | Ht. | Wd. | Dia. | Dp. | Motor Enclosure Type | Includes | Each | Each | Each | |||
120V AC, Single Phase—Hardwire | |||||||||||||||||
| 7" | 190 cfm @ 0 in. of H₂O | Direct | 1,050 | 1/25 | 8" | 8" | 8" | 17 1/8" | 13" | Open Dripproof | __ | 000000 | 0000000 | 0000000 | 000000 | 0000000 | 000000 |
| 10" | 250 cfm @ 1/4 in. of H₂O 550 cfm @ 0 in. of H₂O | Direct | 1,050 | 1/25 | 10" | 10" | 10" | 21 1/8" | 16" | Open Dripproof | __ | 000000 | 000000 | 0000000 | 00000 | 0000000 | 00000 |
| 13" | 1,400 cfm @ 1/4 in. of H₂O 1,600 cfm @ 0 in. of H₂O | Direct | 1,075 | 1/6 | 12" | 12" | 12" | 30 3/16" | 28 3/4" | Open Dripproof | __ | 000000 | 000000 | 0000000 | 00000 | 0000000 | 00000 |
| 16" | 2,400 cfm @ 1/4 in. of H₂O 2,800 cfm @ 0 in. of H₂O | Direct | 1,075 | 1/3 | 14" | 16" | 16" | 34 11/16" | 30 7/8" | Open Dripproof | __ | 000000 | 00000000 | 0000000 | 000000 | 0000000 | 00000 |
120/230V AC, Single Phase—Hardwire | |||||||||||||||||
| 18" | 4,000 cfm @ 1/4 in. of H₂O 4,300 cfm @ 0 in. of H₂O | Direct | 1,125 | 3/4 | 20" | 20" | 20" | 39 7/16" | 35 5/8" | Open Dripproof | __ | 0000000 | 00000000 | 0000000 | 000000 | 0000000 | 000000 |
| 20" | 4,000 cfm @ 0.2 in. of H₂O 5,000 cfm @ 0 in. of H₂O | Direct | 1,725 | 1/3 | 20" | 25 3/4" | 25 3/4" | 29 1/2" | 40" | Totally Enclosed | Louvers | 0000000 | 00000000 | 000000 | 00 | 000000 | 00 |
| 24" | 5,300 cfm @ 0.2 in. of H₂O 7,300 cfm @ 0 in. of H₂O | Direct | 1,725 | 1/2 | 24" | 31 1/2" | 31 1/2" | 34 1/2" | 45" | Totally Enclosed | Louvers | 0000000 | 00000000 | 000000 | 00 | 000000 | 00 |
| 36" | 5,800 cfm @ 0.2 in. of H₂O 10,500 cfm @ 0 in. of H₂O | Direct | 825 | 1/2 | 36" | 44" | 44" | 53" | 57" | Totally Enclosed | Louvers | 0000000 | 00000000 | 000000 | 00 | 000000 | 00 |
| 50" | 16,200 cfm @ 0.2 in. of H₂O 12,100 cfm @ 0 in. of H₂O | Belt | 1,725 | 1 | 50" | 56" | 56" | 63" | 47 1/4" | Totally Enclosed | Louvers | 0000000 | 00000000 | 000000 | 00 | 000000 | 00 |