Please remember these liners are sold in 5 increments 15 20 25 so for instance an 18 chimney will need a 20 liner.
Fireplace insert without chimney liner.
The chimney draft is created like a tornado when a warm front meets a cold front.
A connector and chimney system designed with the wood burning insert in mind would be a necessary addition to the wood burning stove inserted into the fireplace.
Without a chimney liner your chimney will be in danger of overheating which can cause your chimney to combust.
Grout shall be prevented from bonding with the flue liner so that the flue liner is free to move with thermal expansion.
For chimneys more than 40 inches 1016 mm wide two additional no.
When the correct insulated chimney liner is installed there is far less resistance to flow and very little temperature variation within the venting system therefor although creosote is not.
You don t want to play with fire and if you don t have a liner then you re in danger of burning down your house.
A different equation when installing an insert into a fireplace the size of an insert s firebox is smaller than that of the masonry firebox so the existing masonry flue may now be disproportionately large.
This is why it is important to have a wood burning fireplace insert installed with its own round properly sized and insulated chimney liner pipe.
4 vertical bars shall be provided for each additional flue incorporated into the chimney or for each additional 40 inches 1016 mm in width or fraction thereof.