In terms of energy efficiency, which part sets mandatory building requirements?

Part 11 of the Ontario Building Code specifically addresses energy efficiency and sets out the mandatory requirements for building design and construction. This section is crucial as it outlines the standards that must be adhered to in order to achieve acceptable levels of energy performance in buildings.

Part 11 provides a comprehensive framework for various energy efficiency measures, including those related to heating, cooling, ventilation, and overall building envelope performance. By establishing clear requirements, it aims to reduce energy consumption, improve occupant comfort, and minimize environmental impact, thus playing a vital role in promoting sustainable building practices.

Other parts of the Code, such as Part 1, generally cover administrative provisions, while Part 9 is more focused on housing and small buildings. Part 12 deals with building accessibility, not energy efficiency. Therefore, only Part 11 directly addresses the mandatory requirements related to energy efficiency within the Ontario Building Code.