Harman® • XXV Installation Manual_R23 • 2004 -___ • 08/13
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3-90-00684i
#6 Installing into an existing fireplace chimney
This method provides excellent venting for normal operation.
This method also provides natural draft in the event of a
power failure.
In some places in the US and Canada it is required that the
vent pipe extend all the way to the top of the chimney. The
pipe or liner inside the chimney should be 4" diameter.
In this method a cap should also be installed on the chimney
to keep out rain. Be sure to use approved pellet vent pipe
fittings. Seal pipe joints with silicone or aluminum tape in
addition to the sealing system used by the manufacturer. Pipe
size should be increased to 4" using this method.
#7 Installing into an existing chimney
This method provides excellent venting for normal operation.
This method also provides natural draft in the event of a
power failure.
In some places in the US and Canada it is required that the
vent pipe extend all the way to the top of the chimney. Seal
pipe joints with silicone or aluminum tape in addition to the
sealing system used by the manufacturer. The pipe or liner
inside the chimney should be 4" diameter.
In this method a cap should also be installed on the chimney
to keep out rain.
Figure 4.5
Figure 4.6
