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In Canada, the CSA-B365 Standard permits «Roxul» type wool to be stuffed around the liner as
it passes through the throat area as an alternative to a sheet metal block-off plate. However, this
method is less efficient than using a plate.
A
Figure 4 : Block-off Plate
7.3
Suitable Chimneys
This wood insert will provide optimum efficiency and performance when connected to a 6 "
diameter chimney liner. The connection to a chimney having a diameter of at least 5 " (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 " . The reduction of the liner diameter to less than 6 " should only be done if the total height of
the masonry chimney is greater than 20 feet.
7.4
Chimney Liner Installation
The use of a chimney liner (rigid or flexible) is recommended
to ensure the best performance. To ensure an optimal
draft, it is 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 chimney liners listed UL 1777, ULC S635 or CAN/
ULC S640.
In order to connect the insert to the liner, refer to section
« 7.5 Liner Connection ».
ATTENTION INSTALLER:
When positioning the unit in a fireplace opening, prior to
the flue installation, install the insert into the opening until
the top lip of air jacket is flush with fireplace facing.
If lag bolts or anchors are to be used to secure the insert,
the holes location should be marked with the unit in place.
Remove the insert and set the anchors.
Page 22
Figure 5 : Block-off Plate
RAIN CAP
RIGID LINER
FLASHING
36"
914mm MIN.
MASONRY FLUE
6" STAINLESS STEEL
RIGID OR FLEX LINER
Figure 6 : Liner Installation
Wood Inserts – Owner's Manual
12"
305mm MIN.
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