HEI240 Wood Insert Fireplace 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,
CAN/ULC S635.
To connect the insert to the liner, refer to
Section 9.5
Chimney liner installation
.
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 hole locations
should be marked with the unit in place.
Remove the insert and locate the
anchors.