8
53D0419
VENT INSTALLATION
4. Connect a section of pipe and extend up through the hole.
NOTE: If an offset is needed to avoid obstructions, you must support the vent pipe
every three (3) feet. Use wall straps for this purpose. Page 26, Figure 33. Whenever
possible, use 45° elbows instead of 90° elbows. The 45° elbow offers less restriction
to the flow of the flue gases and intake air.
5. Place the flashing over the pipe section(s) extending through the roof. Secure the base of
the flashing to the roof and framing with roofing nails. Be sure roofing material overlaps the
top edge of the flashing. There must be a 1" clearance from the vent pipe to combustible
materials.
6. Continue to add pipe sections until the height of the vent cap meets the minimum building
code requirements.
NOTE: You must increase vent height for steep roof pitches. Nearby trees, adjoining
roof lines, steep pitched roofs, and other similar factors may cause poor draft or down-
drafting in high winds. Increasing the vent height may solve this problem.
NOTE: If the vent pipe passes through any occupied areas above the first floor, including
storage spaces and closets, you must enclose pipe. You may frame and sheetrock
the enclosure with standard construction material. Make sure to meet the minimum
allowable clearances to combustibles. Do not fill any of the required clearance spaces
with insulation.
