Part 4 - General venting
Additional instructions for termination through a wall with a wall terminal.
The concentric wall terminals can be installed through a wall made of combustible material, no extra
parts are necessary. The venting system shall terminate in accordance with the requirements of
CAN/CGA-B149., Natural Gas Installation Code.
The venting system that exits the structure through sidewall or the like shall terminate not less than
12 inches above the ground. The termination of venting system shall be located above the snow line
in geographical areas where snow accumulates (See section 5) .
The termination of the venting system shall not be located in traffic areas, such as walkways,
unless the venting system is at least 2.13m (7 feet) above the ground (See section 5).
Fire stops
Whenever the venting system penetrates a floor or ceiling and is not running in a fire-rated shaft, a fire-stop
is required. Nail the fire stop to the structure and pass the venting sections through the hole. See figure 4.7.
Figure 4.7 Fire stop
Mounting instructions for wall terminal Installation
Figure 4.8 Wall terminal overview
1.
Check the flue terminal for possible damage before installation. If damage is evident replace the flue
terminal with one that is free from damage.
2.
Determine the appropriate location of flue terminal. See figure 4.9.
Figure 4.9 Flue terminal location determination
3.
Cut a hole with a diameter 10 mm (0.4 inch) larger than the flue terminal. Horizontal flue terminals with
flexible exterior gaskets can be installed inside out. In this case, the hole through the wall must have a
diameter 25 mm (1 inch) more than the terminal. Be sure to protect the air inlet and flue outlet connections of
the appliance from wood shavings, dust or dirt while cutting. See figure 4.10.
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