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.
Supply-Side Guards for Wall-Mount Exhaust Fans
Protect the supply side of your wall-mount exhaust fans from debris.
For technical drawings and 3-D models, click on a part number.
Overall | |||||||
|---|---|---|---|---|---|---|---|
| For Blade Dia. | Ht. | Wd. | Dp. | Material | Mounting Fasteners Included | Each | |
| 20", 24" | 30 1/2" | 30 1/2" | 25" | Galvanized Steel | Yes | 00000000 | 0000000 |
Exhaust-Side Guards for Wall-Mount Exhaust Fans
Protect the exhaust side of your wall-mount exhaust fans from debris.
For technical drawings and 3-D models, click on a part number.
Overall | |||||||
|---|---|---|---|---|---|---|---|
| For Blade Dia. | Ht. | Wd. | Dp. | Material | Mounting Fasteners Included | Each | |
| 20", 24" | 27 3/4" | 27 3/4" | 6" | Galvanized Steel | Yes | 00000000 | 0000000 |
Corrosion-Resistant Direct-Drive Wall-Mount Exhaust Fans with Louvers
Rust won't be a problem with the durable plastic housing and louvers on these fans. The fans come complete with a movable-blade louver. The louvers are gravity operated so they open only when air flows through them, which prevents backdrafts. 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. All have a totally enclosed motor enclosure, which can be used in dirty, dusty, and damp environments.
For technical drawings and 3-D models, click on a part number.
For Opening | Overall | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Blade Dia. | Airflow, cfm | Motor Speed, rpm | No. of Speeds | Power, hp | Ht. | Wd. | Ht. | Wd. | Dp. | Max. Ambient Temperature | Housing Material | Blade Material | Each | |
120/230V AC, Single Phase—Hardwire | ||||||||||||||
| 20" | 3,100 | 1,700 | 1 | 1/3 | 25 3/4" | 25 3/4" | 28 1/4" | 28 3/4" | 25 1/2" | 104° F | Fiberglass | Polypropylene Plastic | 0000000 | 0000000 |
Light Duty Direct-Drive Wall-Mount Exhaust Fans with Louvers
These light duty fans are designed for use without duct. They come complete with a movable-blade louver. The louvers are gravity operated so they open only when air flows through them, which prevents backdrafts. 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. All have a totally enclosed motor enclosure, which can be used in dirty, dusty, and damp environments.
For Opening | Overall | |||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Blade Dia. | Airflow, cfm | Motor Speed, rpm | No. of Speeds | Power, hp | Ht. | Wd. | Ht. | Wd. | Dp. | Max. Ambient Temperature | Control Type | Frame Material | Blade Material | Mount. Fasteners Included | Mount. Hole Dia. | Specifications Met | Each | |
120V AC, Single Phase—Hardwire | ||||||||||||||||||
| 20" | 2,925 | 1,140 | 2 | 1/4 | 20 1/2" | 20 1/2" | 23" | 23" | 9 1/2" | 100° F | Pull Switch | Steel | Aluminum | No | 5/16" | UL Recognized Component | 00000000 | 0000000 |
120V AC, Single Phase—Three-Prong Plug | ||||||||||||||||||
| 20" | 2,925 | 1,140 | 2 | 1/4 | 20 1/2" | 20 1/2" | 23" | 23" | 9 1/2" | 100° F | Pull Switch | Steel | Aluminum | No | 5/16" | UL Recognized Component | 00000000 | 000000 |
230/460V AC, Three Phase—Hardwire | ||||||||||||||||||
| 20" | 2,820 | 1,720 | 1 | 1/3 | 20 1/2" | 20 1/2" | 23" | 23" | 12 1/2" | 100° F | __ | Steel | Aluminum | No | 1/4" | UL Recognized Component | 00000000 | 000000 |
Dust-Resistant Direct-Drive Wall-Mount Exhaust Fans
Better suited for dirty, dusty, and damp environments than standard direct-drive fans, these have a totally enclosed motor enclosure. 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.
Collars and louvers are sold separately. Use a collar to connect a wall-mount exhaust fan to a louver.
For technical drawings and 3-D models, click on a part number.
Overall | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Blade Dia. | Airflow, cfm | Volume | Motor Speed, rpm | No. of Speeds | Power, hp | Ht. | Wd. | Dp. | Wt., lbs. | Max. Ambient Temperature | Frame Material | Blade Material | Specifications Met | Each | ||
120V AC, Single Phase—Hardwire | ||||||||||||||||
| 3 | 20" | 2,925 | Not Rated | 1,140 | 2 | 1/4 | 23" | 23" | 12" | 35 | 100° F | Steel | Aluminum | UL Recognized Component | 0000000 | 0000000 |
120/230V AC, Single Phase—Hardwire | ||||||||||||||||
| 3 | 20" | 6,200 | 56 dBA @ 15 ft. | 1,750 | 1 | 3/4 | 28" | 28" | 15 5/8" | 60 | 104° F | Steel | Aluminum | __ | 0000000 | 000000 |
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.
Fans with an open dripproof motor enclosure are for relatively clean, dry, indoor locations. Use a collar (sold separately) to connect these fans to a louver.
Fans with louvers create a weather-tight seal when they're turned off. The louvers open automatically on startup and spring closed when not in use.
Weather hoods (sold separately) help extend the life of your exhaust fan by protecting it from harsh weather, such as severe wind, and debris.
For technical drawings and 3-D models, click on a part number.
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 | |
| 20" | 2,900 | 65 dBA @ 5 ft. | 1,125 | 2 | 1/4 | 25 1/2" | 25 1/2" | 8 3/4" | Aluminum | Steel | 1/4" | Guard | 4 | 0000000 | 0000000 |
Fans (Includes Louvers) | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
For Opening | Overall | Mounting Hole | Weather Hoods | ||||||||||||||||
| Blade Dia. | Airflow, cfm | Volume | Motor Speed, rpm | No. of Speeds | Power, hp | Ht. | Wd. | Ht. | Wd. | Dp. | Frame Material | Blade Material | Dia. | Location | No. of | Each | Each | ||
| 20" | 3,100 | Not Rated | 1,725 | 1 | 1/3 | 22" | 22" | 23 1/2" | 23 1/2" | 18 3/4" | Galvanized Steel | Aluminum | 3/16" | Frame | 4 | 0000000 | 0000000 | 00000000 | 0000000 |
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. 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.
For technical drawings and 3-D models, click on a part number.
For Opening | Overall | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Blade Dia. | Airflow @ Static Pressure | Drive Type | Motor Speed, rpm | Power, hp | Dia. | Ht. | Wd. | Dia. | Dp. | Motor Enclosure Type | Includes | Each | |
120/230V AC, Single Phase—Hardwire | |||||||||||||
| 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 | 000000000 |
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.
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 | Each | Each | ||
Open Dripproof Motor Enclosure | ||||||||||||
120/208-230V AC, Single Phase—Hardwire | ||||||||||||
| 20" | 4,900 cfm @ 1/2 in. of H₂O 5,400 cfm @ 0 in. of H₂O | 74 dBA @ 5 ft. | 1,080 | 1 1/2 | 38 1/4" | 31 3/4" | 30" | Aluminum | 0000000 | 000000000 | 0000000 | 0000000 |
Hazardous Location Exhaust Fans
These fans have a motor that is UL listed for hazardous environments. 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 for less maintenance. Add a collar (sold separately) to connect a wall-mount fan these fans to a louver.
For technical drawings and 3-D models, click on a part number.
Fans | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Overall | Collars | |||||||||||||||
| Blade Dia. | Airflow, cfm | Volume | Drive Type | Motor Speed, rpm | No. of Speeds | Power, hp | Ht. | Wd. | Dp. | Housing Material | Blade Material | Environmental Rating | Each | Each | ||
120/230V AC, Single Phase—Hardwire | ||||||||||||||||
| 20" | 4,800 | 73 dBA @ 5 ft. | Direct | 1,725 | 1 | 1/2 | 24 1/8" | 24 1/8" | 19 1/2" | Steel | Aluminum | NEC Class I Divisions 1, 2 Group D; NEC Class II Divisions 1, 2 Groups F, G | 0000000 | 000000000 | 0000000 | 0000000 |
230/460V AC, Three Phase—Hardwire | ||||||||||||||||
| 20" | 4,800 | 73 dBA @ 5 ft. | Direct | 1,725 | 1 | 1/2 | 24 1/8" | 24 1/8" | 19 1/2" | Steel | Aluminum | NEC Class I Divisions 1, 2 Group D; NEC Class II Divisions 1, 2 Groups F, G | 0000000 | 00000000 | 0000000 | 000000 |
Fan Guards
These two-piece guards attach to NEMA frame motors.
For technical drawings and 3-D models, click on a part number.
| For Blade Dia. | Guard Dia. | For Motor Frame Size | Guard Material | Each | |
| 18", 20" | 23" | NEMA 42Y | Chrome-Plated Steel | 000000 | 0000000 |