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APEX Installation, Operating, & Service Instructions APEX Installation, Operating, & Service Instructions
Figure 4-7: Direct Vent - Sidewall Snorkel Terminations
nuisance shutdowns. If not, boiler may
be installed with roof vent terminal and
sidewall combustion air terminal.
iii. When installed on the same wall, locate
vent terminal at same height or higher
than combustion air terminal.
c. Locate bottom of vent and combustion air
terminals at least 12 in. (300 mm) [18 in.
(460 mm) in Canada] above the normal
snow line and at least 12 in. (300 mm)
above grade level.
d. Locate vent and combustion air terminals
at least 12 in. (300 mm) from any door,
window, or gravity inlet into the building.
e. Do not install vent terminal directly above
windows or doors.
f. Locate bottom of vent terminal at least 3 ft.
(900 mm)above any forced air inlet located
within 10 ft. (3.0 m).
g. If window and/or air inlet is within 4 ft. (1.2
m)of an inside corner, maintain at least 6
ft. (1.8 m)spacing between terminal and
adjoining wall of inside corner.
h. Locate bottom of vent terminal at least 7 ft.
(2.1 m) above a public walkway.
4 Venting (continued)
Figure 4-8: Direct Vent - Sidewall Low Profile Termination
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