Close the damper and plug the flue of a fireplace you rarely use
Added
Fireplace dampers rarely close tightly, so an unused chimney can leak warm air all winter. Close the damper, then stuff a double-bagged insulation batt, old pillows or a sleeping bag into the flue below the damper, and leave a note card in the fireplace so nobody lights a fire before removing it.
The result
Result: DOE Building America Solution Center: temporarily air sealing the flue can stop drafts, making the home more comfortable and saving energy; the guide lists the materials and steps.
Note: Fire safety: always remove the chimney plug before lighting a fire.
Source
DOE Building America Solution Center (PNNL): Air Seal Fireplace When Not in Use (opens the original source in a new tab). Check it for the latest numbers before you act.
Optional gear
- Chimney Balloon 24"x9" inflatable flue plug (affiliate link) – Reusable alternative to stuffing the flue; it comes in several sizes, so measure your flue first.
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