Building energy codes lay out the minimum requirements for the envelope (insulation, windows and air sealing), mechanical equipment and lighting of a building (residential and commercial) in terms of energy efficiency/conservation for new construction or major renovations. National model energy codes are updated every three years to incorporate continual improvements in building efficiency in a collaborative, transparent process by a diverse group of stakeholders.

In this presentation prepared by the Midwest Energy Efficiency Alliance, the definition, history, importance and benefits of building energy codes are first introduced. Focusing on residential buildings, the development, adoption process and elements of building energy codes are also illustrated. Finally, some recommendations are given about improving to match the energy codes.