Fans + Air Movers

Air movement equipment clears heat and humidity from a grow space and keeps the canopy evenly mixed, so plants grow in steady conditions. Tents run an inline fan with a clip fan, grow rooms add wall fans, and greenhouses line up HAF fans with shutter exhausts.

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Fans + Air Movers

Air Movement Equipment for Grow Rooms and Greenhouses

Air movement equipment does two jobs in a grow space. Exhaust and inline fans swap stale, hot air for fresh, while circulation fans keep it mixing across the canopy. This collection covers both, from 6-inch clip fans to greenhouse HAF fans. Planning the layout? Start with our guide to grow room ventilation setup....

Air movement equipment infographic: inline and exhaust fans, circulation and HAF fans, air movers, CFM sizing

To narrow it down, browse our inline fans or indoor and greenhouse fans. Both sit inside the wider air, water and CO2 range.

Types of Fans and Air Movers

Inline and Exhaust Fans

AC Infinity CLOUDLINE, Ruck, Can-Fan and ThinkGrow Aero-Fan inline fans pull air through ducting and carbon filters. A Ruck 8 inch S-Prime EVO EC moves 747 CFM on 124 watts. For walls and gables, the AC Infinity AIRLIFT T-Series ramps on a temperature and humidity probe, from 631 to 2,560 CFM.

Clip, Wall and Stand Fans

Clip fans like the AC Infinity CLOUDRAY S6 suit tents, with 325 CFM and 90 degree oscillation. The Hurricane Classic 16 inch wall fan moves 1,342 CFM on 54 watts. Hurricane Pro 20 inch wall and stand fans reach about 4,500 CFM for larger rooms.

HAF Fans and Air Movers

Vostermans Multifan and Schaefer Versa-Kool HAF fans set up a racetrack pattern down a greenhouse. UMass Extension sizes an HAF system at about 2 CFM per square foot of floor, with fans 40 to 50 ft apart. The Quest F10 air mover pushes 1,015 CFM on 1.1 amps from a low-profile body.

How Growers Size Airflow

For exhaust, divide room volume in cubic feet by the minutes per air exchange. Then add 20 to 40 percent for filters and ducting. LED rooms usually land at the low end.

Frequently Asked Questions

What is an HAF fan?

HAF stands for horizontal airflow. These fans hang in a line and push a steady stream down a greenhouse, setting up a racetrack pattern that mixes air ceiling to floor. Vostermans rates its HAF Q fans for serial or parallel loops, and the 18 inch Multifan moves 3,860 CFM.

Air mover vs fan: what is the difference?

An air mover is a compact, low-profile fan built to push air along floors, benches and racks. The Quest F10 slides under canopies, stacks for larger rooms, and pairs with a dehumidifier to help it pull moisture. A standard fan stands or mounts higher to circulate the whole room.

What size exhaust fan for a greenhouse or grow room?

Start with room volume. An 8 x 8 x 8 foot room holds 512 cubic feet and needs roughly 665 CFM at a one-minute exchange with 30% added. Larger greenhouses step up to shutter fans like the AIRLIFT 16 inch at 2,560 CFM.