Rev. B 6-23-08
P/N S794
2 5
1' Min.
4' Min.
4' Min.
4' Min.
4' Min.
3' Minimum clearance if
horizontal distance to
exhaust opening is less
than 10 feet.
Forced Air
Inlet
Vent
Termination
1' Minimum
above snow or
finished grade
(whichever is
higher)
At least 7'
above grade
adjacent
to public
walkways
Vent
Termination
Vent
Termination
Gas Meter
Max. 12"
Min. 3"
Figure 18.
8.
Vent Termination – Horizontal
The terminal must be located (U.S. – See
Figure 18
):
• at least 3" and at most 12" out from the wall (see
Figure 19
), following the vent manufacturer’s instructions
• at least 12" above finished grade or the normally expected snow accumulation level, whichever is higher
• at least 4 feet below or horizontally from, or 1 foot above, any doors or windows or gravity air inlet to a building
• at least 3 feet above any forced air inlet located within 10 feet
• at least 4 feet horizontally from electric meters, gas meters, regulators and relief equipment
• at least 7 feet above grade adjacent to walkways or similar traffic areas
The terminal must be located (Canada – See
Figure 18
):
• at least 10 feet (3.3M) from any opening into a building
• at least 12" (.3M) above finished grade or the normally expected snow accumulation level, whichever is higher
• at least 4 feet (1.2M) horizontally from electric meters, gas meters, regulators and relief equipment
• at least 7 feet (2.1M) above grade adjacent to walkways or similar traffic areas
Allow at least three feet (1M) vertical clearance over
vent termination when terminating under an overhang
or deck.
Avoid corners or alcoves where snow or wind could
have an effect. Exhaust may affect shrubbery and some
building materials. Keep shrubbery away from
termination. To prevent staining or deterioration, sealing
or shielding exposed surfaces may be required.
WARNING
Fire Hazard.
Do not run the heater vent into a common
vent with any other appliance. Do not run the Special
Gas Vent into, through, or within any active vent such
as a factory built or masonry chimney.
3" (7.6 cm) Min.,
12" (30.5 cm) Max.
Clearance
Condensate
drain w/Trap
Condensate
Tee
Support
weight
of pipe
Listed
Terminal
Metal Special
Gas Vent
requires
Appliance
Adapter
Metal
Vent
Body
Slope at least
1/4" per foot
(2 cm per Meter)
down towards
condensate drain
(Optional)
Figure 19.
Section 2. Installation
