The Energy Top Damper offers year-round chimney protection, sealing in heat and AC and keeping out birds, animals, and insects when closed. It's a chimney cap replacement, easily operated with an accessible handle inside the fireplace. Ideal for upgrading older homes without dampers, it's made of rust-resistant stainless steel and aluminum. The precise mechanism outperforms traditional dampers. It boasts a tight seal with a refrigerator-type gasket and a stainless steel spark arrestor cap. For safety, it defaults to the open position during a fire. Lifetime Warranty included.