Direct vent chimney liner

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DRae

New Member
Feb 22, 2022
2
Waterloo
I bought a gas insert to put into my wood burning fireplace where there was previously a gas insert.
There is an existing non-insulated chimney liner of 4 inch but my new gas insert recommends a 3 inch chimney liner. Is this a must?
Is there a way to install it without replacing the chimney liner?
 

bholler

Chimney sweep
Staff member
Jan 14, 2014
28,441
central pa
I bought a gas insert to put into my wood burning fireplace where there was previously a gas insert.
There is an existing non-insulated chimney liner of 4 inch but my new gas insert recommends a 3 inch chimney liner. Is this a must?
Is there a way to install it without replacing the chimney liner?
Ask the insert manufacturer