5.3 Boiler Venting – Side-Wall or Direct Vent Systems Typical Layouts and Requirements.
Caution & Warning:
Improperly sealed venting system could result in carbon monoxide [CO] poisoning; ensure adequate support
and fastening of the system. Ensure venting can safely exhaust all flue gases outside in an effective manner. These
systems must operate under a positive vent pressure condition that is stable. Do not Co-Vent with any other appliance,
the venting system was designed for single appliance venting only.
Side-wall & Direct Vent Systems:
These systems do not fall under any of the gas vent categories, these systems are pre-engineered. These applications of
this venting system must be followed exactly, for safe, efficient and trouble free operation.
System Requirements
:
1. Venting sized accordance to direct vent table
2. Type “BH” [AL294C®] vent material
3. Condensate TEE fitting supplied on the boiler breeching as close as possible and be orientated to avoid
accumulation of flue gas condensation in the boiler or venting is also used for determining flue gas emissions.
4. Vent termination TEE
5. Vent safety device equipped on burner [MR]
Vent Termination Locations & Warning – See Section 5.5
Caution-Warning:
Flue gas condensation is very aggressive and corrosive which could lead to failure of the venting system or drains, consult local and national codes
regarding flue gas condensation disposal. The P-trap assembly must be properly filled with water to avoid escape of flue gas emissions. The flue gas
condensation may require neutralization prior to entering the drain.
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