Lennox 29K12 2" Flue Plug

The Lennox 29K12 2-inch Flue Plug is an essential accessory to gas-fueled Lennox HVAC systems, especially furnaces. It acts like a cleaner and is closer to the flue pipe, through which combustion product is channeled out of the system. During the off-season, your furnace is not in use and the flue plug helps in preventing drafts, and dust from getting into the flue system as well as preventing moisture from penetrating the system. This closure also helps to save your Lennox HVAC equipment by minimizing unwanted air infiltration that may affect the efficiency of your equipment and lead to failure.