How to Control the Heat in a Grow Room

There are two commonly accepted ways to control the temperature in an indoor growing space. The first option is the sealed room, also called a closed-loop, grow room. This method is complicated and requires expensive equipment. Also, it is difficult to control the CO2 and maintain the temperature precisely. The second, more manageable and lower-cost method is to move warm air out and replace it with cool air through a system of fans and tubing.

• 1

  Select your exhaust fans based on the size of your grow room. Multiply the height, length and width of the room -- this will give you a measurement for the amount of cubic feet, thus the amount of air, you have in the room. If your grow room has 288 cubic feet of air, a fan rated to move 265 cubic feet of air per minute will circulate your space's stale air in around a minute.

• 2

  Cut two holes into the walls of your grow room. One hole should be situated up high -- heat rises -- and one lower -- cool air settles. The holes should measure the size of your dryer hose.

• 3

  Locate the fittings and screws that should have been included with your exhaust fans. Many fans, especially those designed for grow room temperature control, come with mounting and accessory fittings. If not, you will need to purchase screws and mounting supplies at a home improvement store.

• 4

  Connect one flange to each of the holes you created using screws and screwdriver.

• 5

  Attach one flange to each of the exhaust fans, unless the factory has already done so.

• 6

  Mount your fans in the desired location. Ensure that your hoses are long enough to reach from each fan to its respective hole in the wall.

• 7

  Run your dryer hose from the flange surrounding the wall hole to the flange on your exhaust fan.

• 8

  Secure each end of the dryer hose to the flange with a hose clamp. Screw down tightly.