Figuring out the proper size for your chimney flue can seem like a challenge.
Chimney flue length.
Solving your chimney s math.
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.
Dimensions for square rectangular and round clay flue liner.
Rigid 304l chimney liner rigid 316l chimney liner single wall black stove pipe double wall black stove pipe metalbestos class a chimney pipe rock vent class a chimney pipe 316l inner 430 outer rock vent class a chimney pipe 304l inner galvalume outer rock vent class a.
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Quality chimney liner material that meets astm and excels in freeze thaw environments.
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.