About Exhaust Fans
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Wind-Driven Roof-Mount Exhaust Fans
Designed to spin freely with the slightest breeze, these fans create a vacuum that draws air out from buildings and ventilation systems—no electricity required. They are also known as turbine ventilators. Mount fans on your roof away from wind obstructions.
Optional mounting bases are sold separately.
| Base Dia. | Overall Ht. | Airflow | Thick. | Max. Temp., °F | Each | |
Galvanized Steel | ||||||
|---|---|---|---|---|---|---|
| 6" | 14 1/2" | 145 cfm @ 4 mph | 0.018" | 150° | 0000000 | 0000000 |
| 8" | 15 1/2" | 255 cfm @ 4 mph | 0.018" | 150° | 0000000 | 000000 |
| 10" | 16 3/4" | 425 cfm @ 4 mph | 0.018" | 150° | 0000000 | 000000 |
| 12" | 17 1/4" | 630 cfm @ 4 mph | 0.024" | 150° | 0000000 | 000000 |
| 14" | 20" | 700 cfm @ 4 mph | 0.024" | 150° | 0000000 | 000000 |
| 16" | 22 1/2" | 950 cfm @ 4 mph | 0.024" | 150° | 0000000 | 000000 |
| 18" | 24" | 1,200 cfm @ 4 mph | 0.024" | 150° | 0000000 | 000000 |
| 20" | 24 1/2" | 1,700 cfm @ 4 mph | 0.024" | 150° | 0000000 | 000000 |
| 24" | 29 1/2" | 2,350 cfm @ 4 mph | 0.024" | 150° | 0000000 | 000000 |
| 30" | 32" | 2,700 cfm @ 4 mph | 0.03" | 150° | 0000000 | 000000 |
| 36" | 38" | 4,000 cfm @ 4 mph | 0.03" | 150° | 0000000 | 000000 |
Stainless Steel  | ||||||
| 6" | 14 1/2" | 110 cfm @ 4 mph | 0.018" | 150° | 0000000 | 000000 |
| 8" | 15 1/2" | 195 cfm @ 4 mph | 0.018" | 150° | 0000000 | 000000 |
| 10" | 16 3/4" | 305 cfm @ 4 mph | 0.018" | 150° | 0000000 | 000000 |
| 12" | 17 1/4" | 440 cfm @ 4 mph | 0.024" | 150° | 0000000 | 000000 |
| 14" | 20" | 600 cfm @ 4 mph | 0.024" | 150° | 0000000 | 000000 |
| 16" | 22 1/2" | 790 cfm @ 4 mph | 0.024" | 150° | 0000000 | 000000 |
| 18" | 24" | 1,000 cfm @ 4 mph | 0.024" | 150° | 0000000 | 000000 |
| 20" | 24 1/2" | 1,200 cfm @ 4 mph | 0.024" | 150° | 0000000 | 000000 |
| 24" | 29 1/2" | 1,700 cfm @ 4 mph | 0.024" | 150° | 0000000 | 000000 |
All bases have a square bottom, round top, and flashing to simplify installation.
To Order: For slope bases, please specify pitch: 1/12-11/12 in increments of 1/12. To determine pitch, use an angle indicator or divide rise by run (see illustration). For instance, if your roof rises 5" in 12" of horizontal space, your pitch is 5/12.
Flat Bases | Straight Bases | Slope Bases | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Outlet Dia. | Base Wd. | Ht. | Flashing Wd. | Material | Each | Each | Each | |||
| 8" | 10" | 10" | 4" | Galvanized Steel | 0000000 | 000000 | 0000000 | 000000 | 0000000 | 0000000 |
| 10" | 12" | 10" | 4" | Galvanized Steel | 0000000 | 00000 | 0000000 | 00000 | 0000000 | 000000 |
| 12" | 14" | 10" | 4" | Galvanized Steel | 0000000 | 00000 | 0000000 | 00000 | 0000000 | 000000 |
| 14" | 16" | 10" | 4" | Galvanized Steel | 0000000 | 00000 | 0000000 | 000000 | 0000000 | 000000 |
| 16" | 18" | 10" | 4" | Galvanized Steel | 0000000 | 000000 | 0000000 | 000000 | 0000000 | 000000 |
| 18" | 22" | 10" | 4" | Galvanized Steel | 0000000 | 000000 | 0000000 | 000000 | 0000000 | 000000 |
| 20" | 24" | 10" | 4" | Galvanized Steel | 0000000 | 000000 | 0000000 | 000000 | 0000000 | 000000 |
| 24" | 30" | 12" | 4" | Galvanized Steel | 0000000 | 000000 | 0000000 | 000000 | 0000000 | 000000 |
Mounting Bases for Wind-Driven Roof-Mount Exhaust Fans
All bases have a square bottom, round top, and flashing to simplify installation.
To Order: For slope bases, please specify pitch: 1/12-11/12 in increments of 1/12. To determine pitch, use an angle indicator or divide rise by run (see illustration). For instance, if your roof rises 5" in 12" of horizontal space, your pitch is 5/12.
For technical drawings and 3-D models, click on a part number.
| Outlet Dia. | Base Wd. | Ht. | Flashing Wd. | Bottom Shape | Each | |
Galvanized Steel | ||||||
|---|---|---|---|---|---|---|
| 8" | 10" | 10" | 4" | Square | 0000000 | 000000 |
| 10" | 12" | 10" | 4" | Square | 0000000 | 00000 |
| 12" | 14" | 10" | 4" | Square | 0000000 | 00000 |
| 14" | 16" | 10" | 4" | Square | 0000000 | 00000 |
| 16" | 18" | 10" | 4" | Square | 0000000 | 000000 |
| 18" | 22" | 10" | 4" | Square | 0000000 | 000000 |
| 20" | 24" | 10" | 4" | Square | 0000000 | 000000 |
| 24" | 30" | 12" | 4" | Square | 0000000 | 000000 |
| Outlet Dia. | Base Wd. | Ht. | Flashing Wd. | Bottom Shape | Each | |
Galvanized Steel | ||||||
|---|---|---|---|---|---|---|
| 8" | 10" | 10" | 4" | Square | 0000000 | 000000 |
| 10" | 12" | 10" | 4" | Square | 0000000 | 00000 |
| 12" | 14" | 10" | 4" | Square | 0000000 | 00000 |
| 14" | 16" | 10" | 4" | Square | 0000000 | 000000 |
| 16" | 18" | 10" | 4" | Square | 0000000 | 000000 |
| 18" | 22" | 10" | 4" | Square | 0000000 | 000000 |
| 20" | 24" | 10" | 4" | Square | 0000000 | 000000 |
| 24" | 30" | 12" | 4" | Square | 0000000 | 000000 |
| Outlet Dia. | Base Wd. | Ht. | Flashing Wd. | Bottom Shape | Choose a Roof Pitch | Each | |
Galvanized Steel | |||||||
|---|---|---|---|---|---|---|---|
| 8" | 10" | 10" | 4" | Square | 0000000 | 0000000 | |
| 10" | 12" | 10" | 4" | Square | 0000000 | 000000 | |
| 12" | 14" | 10" | 4" | Square | 0000000 | 000000 | |
| 14" | 16" | 10" | 4" | Square | 0000000 | 000000 | |
| 16" | 18" | 10" | 4" | Square | 0000000 | 000000 | |
| 18" | 22" | 10" | 4" | Square | 0000000 | 000000 | |
| 20" | 24" | 10" | 4" | Square | 0000000 | 000000 | |
| 24" | 30" | 12" | 4" | Square | 0000000 | 000000 | |