New Builder Insight Bulletin Explores Energy Performance Requirements in Residential Buildings and ASHRAE 90.1 Compliance
Given that residential space heating accounts for 30% to 60% of a building’s total energy consumption – it’s not surprising to learn that the trend towards energy efficiency in British Columbia will continue, with the building enclosure as a focal point for improved performance.
Understanding the requirements for the building enclosure and the compliance paths for multi-unit residential buildings under ASHRAE 90.1 is the focus of the newest Builder Insight bulletin. This eight-page technical bulletin was prepared for the HPO by RDH Building Engineering Ltd.
“While heat flow through the building enclosure cannot be prevented, it can be controlled to reduce the total energy consumption and improve comfort,” said Dave Ricketts, Principal, Senior Building Science Specialist at RDH, and a leader in the building enclosure field throughout Canada and the U.S.
Residential buildings that fall under Part 3 of the 2006 British Columbia Building Code (BCBC) are required to comply with ASHRAE 90.1-2004. The City of Vancouver Building Bylaw (VBBL) references ASHRAE 90.1-2007. However, there are differences between the 2004 and 2007 versions of ASHRAE 90.1, particularly when it comes to building enclosure and window requirements. TheBC Energy Efficiency Act regulations for windows, doors and skylights also need to be considered.
“Builder Insight #7 describes the energy performance requirements for the building enclosure in accordance with these standards, in practical terms that builders can understand,” said Dave. “It also outlines the alternate compliance paths that need to be considered for multi-unit residential buildings.”
The HPO’s Builder Insight bulletins provide practical information on new technologies, research results, good building practices and emerging technical issues to Licensed Residential Builders and others in the residential construction industry.
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