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VENTING REQUIREMENTS:
The Allagash is specifically designed to operate
using 4 Type B vent pipe components or a Listed
Flexible gas liner.
FOLLOW THE GUIDELINES LISTED
BELOW FOR THE PROPER VENTING OF
THE ALLAGASH B-VENT STOVE!
All venting components must be installed in
accordance with the terms of their listing and
manufacturers instructions.
The minimum height of a vertically terminated
system shall be no less than 7', and the
maximum height shall be no more than 35'.
See diagrams page 9.
With steep roofs, nearby trees, and in
predominant windy conditions, poor draft or
down draft conditions can occur. In these cases,
increasing the height of the vent or high wind
termination caps may improve the situation.
ELBOWS: If an offset or elbow is necessary
in the vertical rise, it is important to support
the vent pipe every three feet, to avoid excessive
stress on the offsets.
Whenever possible use 45° elbows opposed to
90° elbows. This offers less restrictions for the
flow of flue gases.
Maximum number of 90° elbows = three
Maximum number of 45° elbows = four
TOTAL MAXIMUM HORIZONTAL
RUN ANYWHERE IN THE VENTING
CONFIGURATION IS 4 FEET. The distance
between any 45° elbows is considered a
horizontal run. See diagrams page 9.
Any Type B vent passing through a roof must
have a flashing, storm collar, thimble and a
Type B cap is required. See diagrams page 9.
Venting on the Allagash CANNOT be less than
4 in diameter or greater than 4 in diameter.
Any
UNUSED flue or masonry enclosure can be
used as a passage way for venting the Allagash:
PROVIDED the flue is relined using Type B
4 vent or Listed Flexible Gas Liner.
The remaining space around the liner in a
masonry or zero-clearance flue CANNOT be
used to vent any other appliance.
When terminating through the roof refer to the
Gas Vent Rule for proper vent termination
height. See Figure 1.
NO venting can terminate horizontally or
below roof eaves.
Passage through combustibles (walls, ceilings)
must be with Type B venting and must
maintain listed clearances.
It is recommended that any horizontal runs
have an upward slope of 1/4 per foot toward
the termination cap.
When venting through a thimble into a
masonry flue any venting exposed in the room
must be Type B venting.
Listed Flexible Gas Liners may not be exposed
in any living space.
7
Figure 1