Quality chimney liner material that meets astm and excels in freeze thaw environments.
Chimney flue length.
For example an 8 x 8 square nominal clay chimney flue tile liner has inside dimensions of 6 3 4 x 6 3 4.
Chimney height also plays a role and taller chimneys generally draft better than shorter ones.
The venting capacity of a rectangular or square masonry flue if translated directly into actual or measured square inches of cross section is less than a round chimney flue of the same square inches of venting capacity.
Chimney liner and flue pipe length calculator select pipe or liner type.
With that in mind the height of the chimney should be at least 15 feet from the floor of the fireplace to the top of the flue.
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Figuring out the proper size for your chimney flue can seem like a challenge.
Typical standards require a cross section area of the fireplace flue or chimney vent to be equal to 1 10 of the area of the fireplace opening itself for a conventional wood burning installation and without considering the effects of a glass fire door.