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VII. Venting (continued)
WARNING
WARNING
!
DO NOT mix vent systems of
different types or manufacturers.
Failure to comply could result in
severe personal injury, death, or
substantial property damage.
Do NOT connect venting to a
chimney flue that is servicing a
separate appliance designed to
burn solid fuel.
Do not insulate polypropylene vent
pipes. Excessive heat could cause
premature vent pipe failure.
Figure 11: Flexible Vent in Masonry Chimney with Separate Combustion Air Intake
Pressure drop for flexible polypropylene line is 20
% greater than from rigid pipe. Multiply measured
flexible polypropylene liner length by 1.2 to obtain
equivalent length.
Maximum equivalent vent length of flexible
polypropylene liner is 48 ft. (14.6 m).
32
NOTICE
NOTICE
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