13
(Combustible material)
External wall,
combustible material
• Inspection openings are suggested for the vent intake and exhaust
pipes if they are installed in an enclosure. These openings should
be near the entrance and exit of the vent into the enclosure.
• These openings should be 18" x 18".
Suggested inspection openings (18" x 18")
When the vent pipe passes through an enclosed space:
Ceiling
Sloping down toward vent terminal
Vertical Vent Termination
Firestop
Firestop/
Support
Roof Flashing
(Base and Adapter)
Air Intake
Pipe
Rain
Cap
5' or more
Hanger
Strap
Elbow
Slope vent
Upwards
* Condensate collector
must be used if the
vertical run exceeds 3'.
Drain condensate
according to
local codes.
• Terminate at least 6' from the combustion air
intake of any appliance, and 3' from any
other building opening, gas utility meter, service
regulator etc.
• Enclose exterior vent systems below the roof
line to limit condensation and protect against
mechanical failure.
• When the vent penetrates a floor or ceiling and
is not running in a fire rated shaft, a firestop and
support is required.
• When the vent termination is located not less
than 8' from a vertical wall or similar obstruc-
tion, terminate above the roof at least 2', but not
more than 6', in accordance with the National
Fuel Gas Code ANSI Z223.1/NFPA 54.
• Provide vertical support every 7'.
• Slope the horizontal vent 1/4" for every 12" to-
wards the drain tee.
• The integrated condensate collector must be
used for vertical runs in excess of 3'. Remove
the cap prior to attaching the drain tubing.
• When 2 units are installed in a Quick Connect
Multi System, maintain a minimum distance of
5' between the vertical terminations.
