Harman Stove Company XXV Installation & Operating Manual page 11

Fig. 14
Fig. 15
Venting
#5 Installing into an existing fireplace
chimney (uS and canada)
This method provides excellent venting for normal
operation. This method also provides natural draft in
the event of a power failure.
Some places in the US and Canada it is required
that the vent pipe extend all the way to the top of the
chimney. Per ULC S68.
In this method a cap should also be installed on
the chimney to keep out rain. Be sure to use ap-
proved 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.
#6 installing into an existing
chimney (uS and canada)
This method provides excellent venting for normal
operation. This method also provides natural draft
in the event of a power failure.
In this method a 4 inch liner is installed the entire
length of the flue. Whether using a rigid or flexible
liner, a cap should be installed on the chimney to
keep out rain.
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XXV Pellet Stove