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3” Type “L” or
“PL” Vent pipe
The minimum vent conguration is a 90
o
or Tee on a starter
collar and a 24” length horizontal through an exterior wall.
A cap on the end should direct the ue gases down and away
from the structure. See Fig. 5.
The maximum horizontal length is 8 feet. The minimum
termination height above the exterior grade is 18”. The
maximum total length of any conguration is 18 feet*.
* (see venting graph on page 10 for exceptions)
NOTE: Cleanout Tee’s should always be used on the
transitions to horizontal pipe to allow easy access for
cleaning.
The venting graph allows for one(1) 90 deg. or Tee tting
in any conguration.
If more 90’s, T’s, or 45’s are needed the total length must
be adjusted to allow for the added restriction.
Up to four (4) additional 90’s, Tee’s, or equivalent 45’s
can be added as long as the overall length is adjusted in
accordance with the values listed below. (See the venting
graph on page 10.)
Each Vertical ---- 90 deg. or T subtract 2.5 feet
Each Vertical ---- 45 deg. subtract 1.5 feet
Each Horizontal - 90 deg. or T subtract 5.0 feet
Each Horizontal - 45 deg. subtract 2.5 feet
Venting Into An Existing Chimney
The boiler may be vented into an existing masonry or Class
A metal chimney, providing that the chimney is less than 20
feet above the connector. A ue liner, no more than 4-inch
diameter, must be installed, along with a termination cap and
the proper ashing to seal the existing ue.
The venting Can Not be installed in a chimney serving
another appliance.
The chimney should be cleaned and/or inspected before
installation of the vent liner.
Due to low exhaust temperatures, and the increased
possibility of condensation and creosote formation, additional
measures may need taken to increase the ue temperature.
One such measure would be to remove the two rear-most
spiral bafes, above the burn pot, from their heat exchange
tubes. Although some efciency will be lost, an increased
ue temperature will result.
The flue liner should be inspected frequently, during
operation, to monitor its performance and cleanliness.
Venting
This is the minimum venting conguration. NOTE: A starting
collar is needed in order to remove the units’ cleanout cover.
Fig. 5
Any exterior venting (vent pipe exposed to outside
ambiant temperatures) should be kept to a
minimum, due to potential condensation problems.
This is especially important in high humidity-cold
weather climates, such as maritime areas, lake shores,
and low river valleys.
Other examples of possible installations of the venting.
NOTE: Use only 3” diameterPellet venting system.
Be sure to inspect and clean exhaust venting system
frequently.