The systems approach recognizes the interaction of windows, attics, foundations, mechanical equipment, and all other components and assemblies within the home.
Changes in one or a few of these components can cause changes in how other components perform. If you recognize and take advantage of this fact, and apply appropriate advances in technology to the components, you can reduce your energy costs while improving your comfort. An energy-efficient home is likely to be more marketable—especially if you can show the prospective buyers your low energy bills.
Parts of the system include: air Sealing, ductwork, insulation, windows, air conditioning, and lighting/appliances.
To learn more about how these elements affect each other, download this pdf fact sheet from the Florida Energy Systems Consortium.