You will find more in-depth information available in the resource materials listed at the beginning of these modules

• Since the 1940s building codes have increasingly emphasized insulation and air barrier as essential building components
• Increasing insulation, airtightness and efficiency of mechanicals has reduced energy requirements and carbon emissions.
• 2012 building code introduced minimum energy efficiency compliance.

Attwood, Blaine, "A Comparison Of Building Envelope Performance Levels Between Ontario, Denmark, Germany And The PassiveHouse Standard, In The Low-Rise, Residential Context" (2012).Theses and dissertations.Paper 1250.