Intake Air

Marijuana Horticulture

by Jorge Cervantes

Many rooms have enough fresh air coming in via cracks and holes. But other grow rooms are tightly sealed and require fresh air to be ushered in with the help of an intake fan. An intake fan is the same as the exhaust fan, except it blows fresh air into the room. The ratio of 1 to 4 should give the room a little negative pressure. Delivering fresh air to plants ensures they will have adequate CO2 to continue rapid growth. One of the best ways to deliver air to the plants is to pipe it in via flexible ducting to direct air where it is needed. The air is dispersed evenly throughout the room.

Always make sure fresh air is neither too cold nor too hot. For example, one friend that lives in a hot, arid climate brings col fresh air in from under the house, where the air is few degrees cooler than ambient air.