BOILER BOOK CFC-E STACK/BREECHING SIZE CRITERIA
42
Figure 32. Horizontal through-wall venting using inside air for combustion
The vent must be installed to prevent the potential accumulation of stack condensate in the
horizontal run of vent pipe. Therefore, it is recommended that:
1. The vent shall be installed with a slight downward slope of not more than 1/4” per foot of
horizontal run to the vent termination.
2. The vent must be insulated through the length of the horizontal run.
Note: For installations in cold/freezing climates, it is recommended that:
1. The vent shall be installed with a slight upward slope of not more than 1/4" per foot of horizontal
run to the vent termination. In this case, an approved Condensate trap must be installed per
applicable codes.
2. The vent must be insulated through the length of horizontal run.
The stack vent cap MUST be mounted on the exterior of the building. The stack vent cap cannot be
installed in a well or below grade. The stack vent cap must be installed at least two feet above
ground level and above normal snow levels.
The stainless steel direct vent cap must be furnished in accordance with AGA/CGA requirements.
Refer to table for the recommended sizes of horizontal vent pipe.
To Next Page
Loading...
Need help?
General
