Public agencies are encouraged to:
(1) Evaluate the adequacy of mechanical ventilation and filtration systems in light of the recommendations of the American society of heating, refrigerating, and air conditioning engineers and the building officials and code administrators international; and
(2) Maintain and operate any mechanical ventilation and filtration systems in a manner that allows for maximum operating efficiency consistent with the recommendations of the American society of heating, refrigerating, and air conditioning engineers and the building officials and code administrators international.