The Activated Carbon Filters are constructed with a "packed bed" design to give consistent performance, long life (12 to 18 months), and are completely maintenance free. The packed bed containing 4 pounds of activated carbon prevents the formation of preferential channels which can allow untreated air through the system. This unique design gives PureFlow Filters a larger surface area for significantly lowered pressure drops.

Effective treatment requires the exchange of air in the growing area in a period of 5 minutes. Compute your requirements by multiplying the width times the length times the height of your growing area to obtain the total cubic feet. Divide this number by 5 to determine the proper filter size needed.

4" 6"