Ventilation Building Codes
1203.4 Natural ventilation. For other than Group R occupancies in buildings four stories and less, natural ventilation of an occupied space shall be through windows, doors, louvers or other openings to the outdoors. The operating mechanism for such openings shall be provided with ready access so that the openings are readily controllable by the building occupants. Group R occupancies in buildings four stories and less shall comply with the Washington State Ventilation and Indoor Air Quality Code.
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