If the air in a grow room is not exchanged regularly, it becomes an oxygen rich (and carbon dioxide poor) environment; which results in the slow asphyxiation (strangulation) of the plants. Thankfully, circulating the air from within your house is sufficient enough to promote vigorous growth. Drawing in air from the exterior is ideal, but not always practical due to the grow room location (within the house) and outside air temperatures. We provide the equipment to help yield a heavy crop.