This course encourages and examines the impact of decisions and methods to improve residential energy efficiency. Enforceable energy codes dictate some choices in new construction. Budget concerns will determine the difference between the best life-cycle cost choices and what can actually be afforded. Home energy audits identify existing points of energy loss and suggest areas of potential improvement. Becoming aware of very old and emerging technologies for energy efficiency is enough to get the wheels turning for some. A desire to improve the environment is motivation for many. Whatever the reason, the decision to help conserve our natural resources is a good investment in the future.