G. Connecting Furnace To Vent / Intake Terms - Thermo Pride CLHS1-050P36N Installation And Operation Manual

All installations and services must be performed by qualified service personnel.
4. The exhaust vent and combustion air intake shall be a minimum of 3-inches and a maximum of 24 inches
apart.
NOTICE: When the vent termination is installed correctly, a draft should NOT be present in the system
during the furnace off-cycle.
Figure 6: Typical Rooftop Vent and Air Intake Termination Construction Details
G. CONNECTING FURNACE TO VENT / INTAKE TERMINATIONS
1. Figure 7 depict typical exhaust vent and air intake connections for the furnace model series CLHS1 /
CLHX1, as well as a list of required parts to correctly install each system.
For the -100 & -125 models, which require 3-inch PVC pipe, there will still be a short section of 2-inch
PVC pipe & fittings at the furnace, as the grommet and intake flange are both sized for 2-inch. The length
of 2-inch PVC pipe between the furnace cabinet and the 2-inch x 3-inch reducer fitting must be kept to a
minimum. The maximum length of that 2-inch PVC pipe should be 12 inches.
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