18-28-1105.8.2 Make-up air.
   Provisions shall be made for make-up air to replace the air that is being exhausted. Openings for make-up air shall be located to avoid intake of exhaust air. Supply and exhaust ducts to the machinery room shall serve no other area, shall be constructed in accordance with Article 5 and shall be covered with corrosion-resistant screen of not less than 1/4-inch (6.4 mm) mesh.