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Chimney Liner Size Calculator and Selection Guide

This handy guide is provided to assist you in choosing the right size and type of chimney liner for your home. If you need to convert round liner dimensions to oval or rectangular, try our Liner Shape Calculator. For ordering multiple sections of liner/pipe, try our Chimney Liner and Flue Pipe Length Calculator

Please call us if you have any questions or need further assistance.

Select your appliance type:

Why do I need to choose the correct size chimney liner?

Choosing the correct size liner for your appliance is crucial to ensure your appliance or stove is running properly. The chimney liner should never be undersized for any appliance, especially to accommodate insulation around the liner. The liner size is the number one factor for the appliance to burn properly. Undersized liners will not allow the appliance to vent properly. This can cause smoke to pour out of the stove and it can also cause gas and oil appliances to fail. The ideal flue size is typically determined by the exhaust outlet of the stove or appliance. The rule of thumb for sizing a chimney liner is that you never want it to be smaller than the appliance exhaust hole and you don't want the liner to be three times the area of the exhaust hole of the appliance.

Chimney Liner Measuring Forms

Use the measuring forms above to fill out your chimney measurements. When we receive your form, we will put together a parts list for you to review!