Side Venting Terminal Requirements - Dunkirk Helix VX-050 Installation, Operation & Maintenance Manual

6.7 Side Venting Terminal Requirements

• USA - National Fuel Gas Code, ANSI 223.1/NFPA 54.
• Canada - Natural Gas and Propane Installation Code, CAN/CSA B149.1
Venting terminal from doors and windows
Venting terminal from forced air inlet of other appliances
Venting terminal from snow level
Venting terminal from vegetation
Venting terminal from public walkway
FIGURE 6-15
FIGURE 6-16
Forced Air
Inlet
FIGURE 6-17
3' (0.9m)
Min.
6 - COMBUSTION AIR AND VENT PIPING
:
Termination must be
min. 12" (305mm)
from or below
doors, windows
or gravity inlet. If
boiler uses inside air
min. 4' (1219 mm).
Termination
12"
(305mm)
Min.
Termination
3' (0.9m)
[If located
within 10' (3m)
of forced air
Less than
inlet]
10' (3m)
Min.
See figure 6-15
See figure 6-16
See figure 6-17
See figure 6-18
See figure 6-19
Combustion air and vent termination
must be min.12" (305mm) from or
Doors &
below doors, windows or gravity inlet.
Windows
If boiler uses inside air min. 4' (1219
mm).
Vent gas may condense, forming
moisture, may be corrosive. Protect
Condensate
building materials at vent from exhaust
of vent gas.
Terminate venting system 3' (0.9m)
Forced Air above and 10' (3.0m) from any forced
Inlet air inlet (except boiler's combustion
air inlet).
Terminate vent system bottom,
minimum 12" (300 mm) above highest
anticipated snow level.
Grade, Snow
Avoid locations where snow may drift
& Ice
and block vent and combustion air. Ice
or snow may cause boiler to shut down
if vent or combustion air becomes
obstructed.
Vent termination shall NOT be installed
"L"
closer than 3' (0.9m) from inside
Corner
corner of "L" shaped structure.
29
P/N# 240010618, Rev. E [07/2015]