1. Barrier-free design allows people with disabilities to live more independently within their own homes. Barrier-free design assists not only those with disabilities, but also the elderly and even parents with children in strollers.

2. Cogeneration consists of producing electricity and sequentially utilizing useful energy in the form of steam, hot water, or direct-exhaust gases.

3. Thermal bridging is a component, or an assembly, in a building envelope through which heat is transferred at a substantially higher rate than through the surrounding envelope area.

4. In its publication Fifteen O&M Best Practices for Energy-Efficient Buildings, EPA offers a proven strategy for superior energy management, with tools and resources to help each step of the way (see Based on the successful practices of ENERGY STAR partners, these guidelines for energy management can assist organizations in improving their energy and financial performance while distinguishing themselves as environmental leaders.

5. Albedo is the measure of a surface's reflectivity.

6. Building commissioning is the systematic process of ensuring that a building's complex array of systems is designed, installed, and tested to perform according to the design intent and the building owner's operational needs. The commissioning of new buildings will be most effective when considered throughout the planning stages and as early as schematic design.

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