This Lochinvar flue damper is a mechanical device designed to regulate the flow of exhaust gases from heating equipment. It is constructed from high-quality, durable materials that can withstand high temperatures and corrosive environments. The damper operates by opening or closing to control the amount of exhaust gas that escapes through the flue, thereby optimizing the efficiency of the heating system. It is compatible with specific models of Lochinvar boilers and water heaters. The product dimensions are 8 inches in diameter and it weighs approximately 2 pounds. This flue damper is designed for easy installation and maintenance, ensuring long-term performance and reliability.