Quick Facts The Seal Tight Damper can be installed under a Hy-C Single Flue Chimney Cap. This provides a cover for the Seal Tight Damper when it is in the open position; keeping the rain, snow & critters out and sparks in! Heat loss up the fireplace chimney accounts for an average 8% of your home heating costs! Energy Top Dampers help prevent this heat loss, so you can stay warmer and save money! Quick Tips These Dampers are made for use only with open burning masonry fireplace chimneys. Do not use on chimneys serving vented gas logs. Vented gas logs require the fireplace damper to be removed completely or fixed to a permanently open position; this is to assure that soot, fumes and carbon monoxide do not enter your home. Do not use on chimneys serving wood stoves or other appliances such as inserts, furnaces, etc. Made of stainless steel and aluminum, so components will not corrode or rust . Always opens to a pre-set height, so you don't have to worry about it not opening the entire way! The damper defaults to the open position for maximum safety. Each damper kit includes: 30' cable which can be cut to adjust for perfect fit; fireplace bracket and cool-touch spring handle, mounting adhesive and hardware Lifetime Warranty