Sidewall Venting - Thermo Pride CHB1-50N Installation And Operation Manual

All installations and services must be performed by qualified service personnel.
12. No clearance is required from the outer surface of the thermoplastic piping to combustible
materials for fire hazard prevention.
13. Thermo Products does not require screens be installed in the exhaust vent and air intake piping.
However, optional stainless steel screens are available from Thermo Products, should the
homeowner request them.
NOTICE: The furnace model series CHB1 / CDB1 may be vented either through the sidewall or the
roof. For sidewall instructions, continue to the following section. For roof venting, refer to Section III H,
of this manual
E. Direct Venting Through a Sidewall
1. Vent and combustion air pipes may pass through a maximum wall thickness of 18 inches. The
minimum wall thickness is 2 inches. Referring to Figure 2, the maximum distance from the outer
wall to the center of the elbow is 12 inches.
Figure 2: Proper Direct Vent Terminations (RH & LH views) and Vent Termination Only w/o
NOTICE: If exterior sidewall building materials are subject to degradation from contact with flue
gases or moisture, a minimum 24-inch diameter shield shall be fabricated from stainless steel or
UV-resistant plastic sheet. The protective shield shall be installed around the vent pipe on the
outside wall.
2. The exhaust vent termination elbow shall be installed in accordance with these instructions and
any applicable local codes. Refer to Figures 2 and 3 for typical examples of proper terminations.
a. The exhaust vent termination must be installed in the same atmospheric pressure zone (i.e.
on the same wall) as the air intake termination.
b. The bottom edge of the vent termination elbow must be installed at least 12-inches above the
outlet of intake termination elbow.
c. The horizontal distance between the inlet and exhaust terminations should be minimized,
when possible, and should never exceed 24-inches.
Outside Combustion Air Intake (RH view)
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