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VII. Venting (continued)
C. General Termination
1. Use only listed vent/combustion air terminals.
2. Follow the termination configurations shown in
Table 9.
3. Maintain correct clearance and orientation
between vent and combustion air terminals.
a. Space centerlines of vent and combustion air
terminals minimum 24 in. (610 mm) apart. 36
in. (915 mm) spacing is recommended.
b. If possible, locate vent and combustion air
terminals on the same wall to prevent nuisance
shutdowns. If not, the appliance may be installed
with roof vent terminal and sidewall combustion
air terminal.
c. When installed on the same wall, locate vent
terminal at same height or higher than combustion
air terminal.
4. 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.
5. Locate vent and combustion air terminals at least
12 in. (300 mm) from any door, window, or gravity
inlet into the building.
6. Do not install vent terminal directly above windows
or doors.
7. Locate bottom of vent terminal at least 3 ft. (900
mm) above any forced air inlet located within 10
ft. (3.0 m).
8. 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.
9. Locate bottom of vent terminal at least 7 ft. (2.1 m)
above a public walkway.
10. Maintain minimum clearance of at least 4 ft. (1.2
m) [3 ft. (900 mm)in Canada] horizontally between
vent terminal and gas meters, electric meters,
regulators, and relief equipment. Do not install vent
terminal above or below this equipment.
11. Do not locate the vent terminal under decks or
similar structures.
12. Top of terminal must be at least 24 in. (600
mm) below ventilated eaves, soffits, and other
overhangs. In no case may the overhang exceed
48 in. (1200 mm).
authority having jurisdiction and local experience,
the terminal may be located closer to unventilated
soffits. The minimum vertical separation depends
upon the depth of the soffit.
Where permitted by the
13. For multiple appliance installations with vertical
roof terminals, separate vent pipes may be piped
through a common conduit for chase so that one
roof penetration may be made.
It is the Responsibility of the installing contractor
or venting designers to comply with national and
local codes and follow best industry practices for
installing vent support, drainage, and pitch.
!
Installing multiple vent terminations too close
together may result in combustion product water
vapor condensation on building surfaces where
vent terminations are placed, causing subsequent
frost damage. To avoid/minimize frost damage,
extend the distance from building surfaces to
vent termination end and increase the horizontal
distance between adjacent vent terminations
19
NOTICE
NOTICE
CAUTION
CAUTION
.
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