An aerodynamically designed unit, when fitted to structurally sound chimneys and flues, completely eliminates downdraft and thereby prevents troublesome smoke and toxic fumes which otherwise linger in the home.

Note:For Use with Natural Draft Appliances Not intended for use with Category II, III, or IV gas burning appliances as defined by the National Fuel Gas Code, NFPA 54, or other appliances that result in condensation or corrosive acids on the liner of the chimney, or that create positive pressured in the chimney system.

Features

• Available in 12" and 18"
• Universal or round base sold separately.