The Ontario Building Code | Installation
(1) The installation of fireplace inserts and hearth mounted stovesvented through the throat of a fireplace shall conform to CSA B365, "installation Code for Solid-Fuel-Burning Appliances and Equipment".
(2) fireplace inserts and hearth mounted stoves vented through the throat of a fireplace described in Sentence (1) may be installed in existing fireplaces only if a minimum thickness of 190 mm of solid masonry is provided between the smoke chamber and any existing combustiblematerials, unless the insert is listed for lesser clearances.
(a) a listedmetal chimney liner installed from the insert collar to the top of the chimney, or
(b) a direct sealed connection to the chimney flue where such provision is part of an insert conforming to Sentence 184.108.40.206.(1).
Section 9.23. wood Frame Construction