Another factor in solar heat gain is roofing color. A light-colored roof saves 15 to 20 percent of total cooling energy. Electrical heat loads normally come from lighting and power outlets. New lighting systems that use compact fluorescent lamps and smart controls generate less heat than incandescents that are left on all day. Plug-in devices, such as copiers, computers, and printers, are a large part of the workplace thermal load.
New devices use less energy and put out less heat than older models.
Thermal mass, such as thick concrete or masonry slabs, can be used to buffer peak cooling loads and take advantage of cool nighttime temperatures. Insulation improves winter heating loads in cold climates where the temperature differential between inside and outside air is often more than 60 degrees. You may apply for credits either by downloading the form and faxing or mailing it, or by completing the electronic version and sending it via the Internet.