A flue damper is a cast iron plate with a spindle fitted inside the first piece of flue pipe that connects to the cast iron multifuel or woodburning stove. It works as a butterfly valve. The loss of energy due to room air spillage via the chimney to the outside can be avoided with flue dampers.
It can save more than 4000 kWh per year depending on the combustion heating appliance and the outside conditions
Reduce losses when combustion heating appliance is switched off
Prevent heated room air from escaping via the chimney
Prevent loss of heat stored in the stove
Prevent flue-gas back-flow
Reduce fuel consumption
Tendency of the blade to warp
Large clearance needs for the open blade
The costs of the installation can be quickly recouped by the energy and fuel savings produced. The payback periods which are calculated according to the flue damper, location and chimney diameter are between 1.5-3 years.