Exterior Chimney - Osburn 1800 Owner's Manual

When connecting to a factory built chimney, ensure that it is installed according to the manufacturer's
listed instructions. If using an existing chimney, inspect and clean the chimney if required (this should
be done by a licensed chimney sweep or a qualified professional).
Figure 1.3 – Chimney height

1.5.3.3 Exterior Chimney

Chimneys constructed outside of the home on an exterior wall should be avoided if possible, especially
in colder climates. Exterior chimneys may not draft well and in fact may down draft (reverse flow) due
to the difficulty in heating them up to operating temperature while trying to evacuate the stack gases.
All else being equal, cooler chimneys will have less draft than hotter ones; this may lead to creosoting
and poor performance. If an exterior chimney is used to remove the stack gases the best results will be
obtained by using a connector vertically off the unit to the highest possible point before elbowing off
horizontally to the chimney. For efficiency and safety reasons the stove be installed with an
must not
insulated chimney connected directly to the appliance.
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