This Lochinvar Vent Damper is a critical component designed to enhance the efficiency of heating systems. With an 8-inch diameter, it is compatible with RB/RW315-360 models. The vent damper's primary function is to prevent the escape of warm air from the heating system when it's not in operation, thereby reducing heat loss and improving overall energy efficiency. It operates automatically, opening when the heating system fires up and closing once it shuts down. Constructed from durable materials, this Lochinvar Vent Damper ensures long-lasting performance and reliability in managing heat flow within your system.