401.5 Opening location. Outside air exhaust and intake openings
shall be located a minimum of 10 feet (3048 mm) from lot
lines or buildings on the same lot. Where openings front on a
street or public way, the distance shall be measured to the centerline
of the street or public way.
Exception: Group R-3.
401.5.1 Intake openings.Mechanical and gravity outside air
intake openings, shall be located aminimumof 10 feet (3048
mm) from any hazardous or noxious contaminant such as
vents, chimneys, plumbing vents, streets, alleys, parking lots
and loading docks, except as otherwise specified in this code.
Where a source of contaminant is located within 10 feet
(3048 mm) of an intake opening, such opening shall be located
a minimum of 2 feet (610 mm) below the contaminant