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W415-1501 / E / 12.17.18
EN
18
installation
5.4 offset chimney installation
The first flue offset closest to the top of the
appliance must be a minimum distance of
12" (30.5cm) from the top of the appliance.
Attach an elbow to the chimney section, angled
toward the offset. Secure according to chimney
manufacturer’s instructions. Chimney sections must
be adequately secured one to the other to ensure
they do not separate. To achieve the minimum
offset, attach and secure a second elbow. To
achieve longer offsets, you may install any available
length of chimney pipe between the elbows.
Supports must be used on the first vertical chimney
section after a return elbow.
Attic Insulation
Shield
Storm Collar
Elbow
Elbow Support
Straps
Elbow
Roof
Flashing
Rain Cap
Elbow Support
Band
Roof Joist
Chimney Section
Floor , Ceiling Joist
Firestop
If the offset length is more than 36” (91.4cm), an
intermediate support must be employed. To
achieve longer offsets, you may install any
available length of chimney pipe between the
elbows.The intermediate support must be used
in conjunction with an offset support.
!
WARNING
• Chimney sections installed between an offset and return require structural support to reduce off-center
loading and to prevent chimney sections from separating at the chimney joists.
• The chimney should not be built with an offset angle in excess of 45° in Canada and 30° in USA. Do not
combine offset chimney components to exceed these angles.
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