Clearance Requirements from Vent Terminations to Building Openings
<When supplying combustion air from the indoors>
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front of the exhaust outlet.
$IFDL Illustration
Outdoor Clearances to Opening
into Any Building
NN
or more
NN
or more
There must be no
building opening
within this area.
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NN
or more
NN
or more
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Indoors
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any door, operable window, or gravity air inlet
into any building.
3' above any forced air inlet within 10'.
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opening in any building:
Illustration
4' *
4' *
3' *
1' *