1. Insulation of the building structure or systems within the building;

2. Storm windows or doors, caulking or weather-stripping, multiglazed windows or doors, heat-absorbing or heat-reflective, glazed, and coated window or door systems, additional glazing, reductions in glass area, or other window and door system modifications that reduce energy consumption;

3. Automatic or computerized energy control systems;

4. Heating, ventilating or air conditioning system modifications or replacements;

5. Replacement or modification of lighting fixtures to increase the energy efficiency of the lighting system, but not for the sole purpose of increasing the overall illumination of a facility, unless an increase in illumination is necessary to conform to the applicable state or local building codes for the lighting system after the proposed modifications are made;

6. Indoor air quality improvements;

7. Energy recovery systems;

8. Co-generation systems that produce steam or forms of energy such as heat, as well as electricity, for use primarily within a building or complex of buildings;

9. Any life safety measures that provide long-term operating cost reductions;

10. Water-metering devices that increase efficiency or accuracy of water measurement and energy reduction; and

11. Building operation programs that reduce the operating costs.