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A. All enclosed portions of buildings customarily occupied by humans shall be provided with natural ventilation by means of openable exterior openings with an area not less than 1/20 of the total floor area or shall be provided with a mechanically operated ventilation system. Exterior openings shall open directly upon a public way, yard or court. Such mechanically operated ventilation system shall be capable of supplying a minimum of 15 cubic feet per minute of outside air per occupant in all portions of the building during such time the building is occupied.

B. Toilet rooms shall be provided with a fully openable exterior window with an area of not less than 3 square feet or mechanical operated exhaust system capable of providing complete change of air every 15 minutes. (Ord. M-4079 §27, 2014; Ord. M-3637 §1, 2003)