Specifications

CW2500 Insert Installation and Operation Manual
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9.3 Suitable Chimneys
Your wood insert will provide optimum efficiency and performance when connected to a 6-
inch diameter chimney liner. The connection to a chimney having a diameter of at least 5
inches (Canada only) is permitted, if it allows the proper venting of combustion gases and
that such application is verified and authorized by a qualified installer. Otherwise, the
diameter of the flue should be 6 inches. The reduction of liner diameter to less than 6”
should only be done if the total height of the masonry chimney is greater than 20 feet.
9.4 Liner installation
We recommend the use of a chimney liner (rigid or flexible) to ensure satisfactory
performance. To ensure an optimal draft, we also strongly recommend adding a minimum
of 12” rigid liner between the top of the masonry chimney and the rain cap. In all cases,
liners should be installed in accordance with the liner manufacturer’s instructions, including
instructions for extension above the masonry.
Use Listed Chimney Liners – UL 1777, ULC S635 and CAN/ULC S640.
In order to connect the insert to the liner, refer to Section 9.5 Chimney liner installation.