8.
Vent Termination – Horizontal
The terminal must be located (See Figure 17):
• at least 76 mm (3 in) and at most 304 mm (12 in) out from the wall (see Figure 18),
following the vent manufacturer’s instructions
• at least 304 mm (12 in) above finished grade or the normally expected snow
accumulation level, whichever is higher
• at least 1.2 M (4 ft) below or horizontally from, or 0.3 M (1 ft) above, any doors or
windows or gravity air inlet to a building
• at least 0.9 M (3 ft) above any forced air inlet located within 3 M (10 ft)
• at least 1.2 M (4 ft) horizontally from electric meters, gas meters, regulators and relief
equipment
• at least 2.1M (7 ft) above grade adjacent to walkways or similar traffic areas.
The terminal must be located (See Figure 17):
• at least 3.3M (10 ft) from any opening into a building
• at least 0.3 M (12 in) above finished grade or the normally expected snow accumulation
level, whichever is higher
• at least 1.2 M (4 ft) horizontally from electric meters, gas meters, regulators and relief
equipment
• at least 2.1 M (7 ft) above grade adjacent to walkways or similar traffic areas
Allow at least 1 M (3 ft) 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.
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.
!
WARNING
3" (7.6 cm) Min.,
12" (30.5 cm) Max.
Clearance
Condensate
drain w/Trap
Condensate
Tee
Support
weight
of pipe
Approved
T
Termina
l
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)
NOTE: After installation, installer must check for correct and safe operation of the heater
Figure 18.
