Using energy efficiently can reduce the cost of heating, ventilating, and air-conditioning, which account for a significant part of the overall cost of housing. Energy costs recur month-to-month and are hard to reduce after a home has been designed and built. The development of an energy-efficient home or building must be thought through using a systems approach
Konkel, R. Steven, "Energy Efficiency" (2006). Environmental Health Science Faculty and Staff Research. 6.