Chimney Air Block

Concrete chimney block measures 16 in.

Chimney air block.

And accepts an 8 in. It even works in chimneys that have no damper. The chimney balloon is a inflatable blocker that prevents drafts from a chimney caused by a broken warped or missing flue damper. A chimney balloonis used to close off the flue closed when the unit isn t operating.

Concrete chimney block is used chimney flue. It fits into the chimney just above the firebox and you simply inflate it to block the air passage. Openings shall not permit the passage of spheres having a diameter greater than 1 2 inch 12 7 mm nor block the passage of spheres having a diameter less than 3 8 inch 9 5 mm. The center hole allows you to install chimney liner not included.

1796514 menards sku. The lightweight 16 in. Square chimney block actual size 16 3 4 x 7 5 8 x 16 3 4 model number. Made from concrete for strength and durability.

The damper inside the chimney just above the firebox or area where a fire is built helps keep cold air birds and animals out when the fireplace is not in use. Chimney balloon fireplace dampers air seal the fireplace to stops cold drafts bugs birds bats and chimney smells from entering your house. You ll have to remove the balloon each time you start a fire but if you use your fireplace sparingly this can be a good option.