Chimney liner and flue pipe length calculator select pipe or liner type.
Chimney flue length.
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Chimney height also plays a role and taller chimneys generally draft better than shorter ones.
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.
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.
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.
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Figuring out the proper size for your chimney flue can seem like a challenge.