Use inline fans, also known as duct fans or duct booster fans, to intake & exhaust air out of your grow environment to manage temperature and humidity.

Oscillating Fans - Blowers - Shop All Fans & Ducting

Inline fans are used to keep your grow room at the right temperature & humidity, to ward away pests, and to keep your plants strong. A gentle breeze over your plants from an oscillating fan can help stiffen your plants main stalk, making it better at holding its flowers and fruits without falling over. Bugs also hate wind, so keep that fan moving over the leaves to keep pests from setting up shop.