Energy efficiency means using less energy to perform the same task. Reducing energy use reduces energy costs and carbon footprints. Builders are increasingly seeking to optimize building efficiency and incorporate clean energy technologies in new building construction. With existing building structures, property managers can take small steps such as choosing LED light bulbs and energy-efficient heat pumps or upgrading insulation, cooling, and heating systems. The following collection of products can help building owners and property managers attain greater energy efficiency for their lighting, heating, cooling, and ventilation systems.