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5
Chimney Installation
A. Typical Chimney System
NOTICE: Chimney performance may vary.
•
Trees, buildings, roof lines and wind conditions affect performance.
•
Chimney height may need adjustment if smoking or overdraft occurs.
Figure 5.1 Typical Chimney System - Guidelines for Chimney System Installation
Chimney must extend
beyond combustible
roof structure
Maintain minimum
height of chimney
above roof
Install roof flashing
according to minimum
requirements
Offsets/returns
may not exceed
30° from vertical
Lock chimney
sections together
firmly to resist
movement
Heatilator • MHST36D Installation Manual • 4012-086 • Rev D • 03/17
Termination Cap
Additional
support for
tall chimneys
Storm Collar
Maintain minimum
clearances to
combustibles as
specified
Support straps for offsets
(not shown) must be
secured to adequate framing
Offsets/returns must be
secured with screws
(outer pipe only)
Attic shield
Ceiling firestops
are required where
chimney passes
through ceiling or
floor
17
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