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chimney cleaning, be sure to remove any creosote
or soot build up located over the flue damper and
behind the steel hearth plates inside the fireplace.
For this removal, use a commercial vacuum
cleaner equipped with a flexible nozzle to reach
crannies. (Drawing 20).
8. Humidity and condensation
8.1 Excessive humidity and condensation: In
winter, high humidity levels inside the house can
cause chimney problems such as condensation,
and ice build-up eventually dripping into the
fireplace.
In extreme cases, the condensation
water can even infiltrate the chimney insulation.
Damper and hearth plate cleaning
To prevent chimney fires,
don't forget to remove
soot build-up, ashes,
and creosote over the
chimney damper and
behind the steel
hearth plate.
DRAWING NO 20
To avoid these problems, it is necessary to
maintain an acceptable humidity level of 30-35%
inside the house.
REV. 2014-11
Page 25
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