LAARS U.H.E. - Installation Manual - Manual (Page 26)

Figure 16. Typical Horizontal Power Vent System
Vertical Installation:
Vertical venting must be supported every 5 feet of vertical run and every 3 feet of horizontal run of vent pipe
length.
Stress levels in the pipe and fittings can be significantly increased by improper installation. If rigid pipe clamps
are used to hold the pipe in place, or if the pipe cannot move freely through a wall penetration, the pipe may be
directly stressed, or high thermal stresses may be formed when the pipe heats up and expands. Install accordingly
to minimize such stresses.
CAUTION
Failure to properly support the vent piping with hangers and clamps may result in damage to the water heater
or venting system.
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