Indiana Code Title 36. Local Government § 36-1-12.5-1

(A) a facility alteration;

(B) an alteration of a structure (as defined in IC 36-1-10-2);

(C) a technology upgrade;  or

(D) with respect to an installation described in subdivision (2)(G) or (2)(H), an alteration of a structure or system;

(A) Providing insulation of the facility or structure and systems in the facility or structure.

(B) Installing or providing for window and door systems, including:

(C) Installing automatic energy control systems.

(D) Modifying or replacing heating, ventilating, or air conditioning systems.

(E) Unless an increase in illumination is necessary to conform to Indiana laws or rules or local ordinances, modifying or replacing lighting fixtures to increase the energy efficiency of the lighting system without increasing the overall illumination of a facility or structure.

(F) Providing for other conservation measures that provide billable revenue increases or reduce energy or water consumption, reduce operating costs, or reduce wastewater costs, including future:

(G) Installing equipment upgrades that improve accuracy of billable revenue generating systems.

(H) Installing automated, electronic, or remotely controlled systems or measures that reduce direct personnel costs.