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The space between the bottom of floor joists and the ground of any building (except space that is occupied by a basement or cellar) shall be provided with a sufficient number of ventilating openings through foundation walls or exterior walls to ensue ample ventilation. The minimum total area of ventilating opening shall be proportioned on the basis of 1½ square feet for each 50 linear feet, or major faction thereof, of exterior wall, so located as to provide adequate cross-ventilation.
The air space shall be kept clean and free from any accumulation of rubbish, debris or filth.
(Added by Ord. 399-89, App. 11/6/89; amended by Ord. 161-92, App. 6/4/92; Ord. 256-07, App. 11/6/2007)