20 ILCS 1115/3

As used in this Act: "HVAC" means a system that provides comfort, heating or air-conditioning within or associated with a building. "Lighting efficiency standards" means practices or regulations which would conserve the energy needed to light new public buildings. "Thermal efficiency standards" means regulations or practices which would conserve energy by affecting the exterior envelope physical characteristics, HVAC system selection and configuration, HVAC system performance and service water heating design and equipment selection for all new and renovated buildings. "Unit of local government" means a county, municipality, township, special district, school district, and a unit designated as a unit of local government by law, which exercises limited governmental power or powers in respect to limited governmental subjects.