No trapped plumbing fixture shall be located
in any room or apartment which does not contain a window placed in
an external wall of the building or is not provided with a system
of ventilation.
Every toilet room and every water closet or
urinal compartment, unless provided with a suitable system of exhaust
ventilation, shall be ventilated directly to the outer air by movable
windows or by skylights with fixed or pivoted louvers. Every such
toilet room or compartment shall have a window or glass skylight not
less than one foot wide and an area of not less than six square feet
for one water closet or urinal, and the area of the window or skylight
shall be increased by at least one square foot for every additional
water closet or urinal.
If a mechanical system of ventilation is used,
such system shall consist of metal or smooth masonry ducts extending
from the individual toilet rooms or compartments to a fan or fans
of sufficient capacity to exhaust a volume of not less than 30 cubic
feet of air per minute for each water closet or urinal, and in no
case shall fewer than six changes of air in the toilet room or compartment
be allowed per hour. The exhaust ducts shall discharge into the outside
air above the room and in such a manner as not to create objectionable
odors or a nuisance on the premises or adjacent premises.
Ventilation from toilet room shall be separate
and distinct and have no connection whatever with the other ventilating
ducts in the building.
