The center hole allows you to install chimney liner not included.
Chimney air block.
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.
Concrete chimney block is used chimney flue.
The center hole allows you to install chimney liner not included the block is uniform in shape color and texture.
The chimney balloon stops this heat loss by acting as a chimney stopper to insulate your fireplace and save you money heat and comfort.
And accepts an 8 in.
Made from concrete for strength and durability.
Square chimney block actual size 16 3 4 x 7 5 8 x 16 3 4 model number.
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.
It fits into the chimney just above the firebox and you simply inflate it to block the air passage.
The lightweight 16 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.
1796514 menards sku.
A chimney balloonis used to close off the flue closed when the unit isn t operating.
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.