The Toronto, Ontario Framework comprises a full set of targets for the five most common building archetypes that require increasing levels of performance over time. Four tiers of performance were developed to take the building industry from today’s building practices to a near-zero emissions level of performance by the year 2030.  The emphasis on total energy use, thermal demand reduction and GHGI encourages a passive design-first approach coupled with high efficiency active systems, such as heat recovery, and improved air tightness.