Heatmax Furnace Installation and Operation Manual
48
8.2.1 Factory-built metal chimneys
These are sometimes referred to as
‘high temp’ chimneys because they
have the special characteristics to
withstand the temperatures that can be
created by wood burning furnaces.
Factory-built chimneys are tested as a
system
with
all
the
necessary
components
for
installation.
The
instructions provided with the chimney
by its manufacturer are the only reliable
source of installation guidelines. To be
safe and effective, the chimney must
be installed exactly in accordance with
the manufacturer’s instructions. Use
only components intended for the
brand and model of chimney you are
using. Never substitute parts from
other chimney brands or fabricate
your own components. The chimney
must be a type suitable for solid
fuel.
8.2.2 Masonry chimneys
The furnace may also be connected to
a masonry chimney, provided the
chimney complies with the construction
rules found in the building code
enforced locally. The chimney must
have either a clay liner or a suitably
listed stainless steel liner. If the
masonry chimney has a square or
rectangular liner that is larger in cross
sectional area than a round 6” flue, it
should be relined with a suitably listed
6” stainless steel liner. Do not
downsize the flue to less than 6” unless
the venting system is straight and
exceeds 25 feet in height. When
passing through a combustible wall, the
use of an insulated listed thimble is
required.
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