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10 YEAR WARRANTY
Precision-engineered, in-line centrifugal fans. Quiet, efficient and simple to install. Permanently lubricated, maintenance-free. Mounting brackets included.
Variable fan speed:
Air Movement Fans
Vent fans are used to exhaust warm stale air from an enclosed growing area to be replaced by fresh air. Sizes indicate the volume of air that can be extracted from a growing area in cubic feet per minute (cfm). Choose a size that remove all air in 5 minutes or less. To calculate the right size, multiply room height X width X length and divide by 5. When in doubt, order one size larger.
Vortex 172 CFM 4 inch ............................... $ 209.00
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Air Flow. Fans