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Fireplace Liner Sizing Guide
The chart below uses a 10-1 ratio.  A 10-1 ratio should be used for chimneys less than 25 feet in height and a 12-1 ratio for chimneys greater than 25 feet in height.


Fireplace Opening

Liner Size
Up to 600 sq. in 9"
601 - 760 sq. in. 10"
761 - 942 sq. in. 11"
943 - 1140 sq. in. 12"
1141 - 1356 sq. in. 14"
1357 - 1846 sq. in. 16"








 

 
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