5
•
Underneath a wooden verandah, porch, or deck.
•
Underneath cement verandah, porch, or deck, unless both ends are open and the exhaust pipe is
installed at least 24” under the deck floor.
•
So situated that the flue gases are directed towards brickwork, siding, or other construction, in such a
manner that may cause damage from heat or condensate from the flue gases
•
Less than 3’ from an inside corner of an L-shaped structure (including walls and fences).
•
Install the warning plate “Gas vent Directly below” 4 feet above the location of the air inlet pipe, so it
is visible from at least eight (8) feet away.
Apply plastic venting label (included in the manual envelope) above all fresh air inlets
(see figure)
3.3 VENTING CONFIGURATIONS
Selection of acceptable venting materials.
Vent Piping A&C:
See Chart for maximum lengths
•
3” ABS solid core.
•
3” PVC
Sch.40.
•
3” CPVC Sch.40 pipe.
•
3” AL29-4C Rigid Stainless Vent.
Air Supply Vent B:
See Chart for maximum lengths
•
3” ABS.
•
3” PVC
Sch.40 pipe.
•
3” Galvanized Steel pipe
Two-Pipe Vent Terminals
Warning
Field supplied piping and fittings are required to
complete installation. The combustion air and
vent pipe and fittings must conform to ANSI and
ASTM standard D1785 (Schedule 40 PVC),
D2665 (PVC-DWV), and D2661 (ABS-DWV).
Pipe cement and primer must conform to ASTM
standard D2564 (PVC) or D2235 (ABS).
Coupling and
elbow to be
against wall
– ½” play is
acceptable
12” Plus
Snow allowance
Example 12+19=31”
18” Min
The vertical portion of
the exhaust termination
does not require
insulation, if less than 5
feet in total length
Note: horizontal
spacing must be
between 4-12”
(center to center)
or greater than 36”
36”
18”
Min.
12” plus snow
Allowance
Apply plate here
Gas Vent Directly Below
Keep free of Obstructions
