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Building Envelope

The building envelope is responsible for the most significant loads that affect heating and cooling energy use. Principal components of heating loads are building envelope infiltration as well as conduction losses through building envelope components – walls, roofs, floors, slabs, windows and doors. The Building Energy Efficiency Standards have both mandatory measures and prescriptive requirements that affect the design of the building envelope. Common strategies for exceeding the minimum energy performance level include more effective use of components such as more insulation, higher efficiency windows, housewrap, radiant barriers, and higher efficiency heating, cooling and water heating equipment.