Is this article then false?
http://www.building.ca/news/web-exclusive-the-updated-ontario-building-code/1001011870/
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The Updated Ontario Building Code
By: Steve Kemp, P.Eng
2012-03-29
The update to the 2006 Ontario Building Code, which went into effect in January 2012, is the most progressive code-required energy standard in North America. There are some significant changes to the code which will likely significantly reduce the number of glass-walled towers being constructed in Ontario cities—and not a moment too soon say energy and design professionals.
What’s Changed in the Code?
The updated OBC generally follows the building standard outlined in ASHRAE 90.1-2010 combined with the green building ASHRAE 189-2009 envelope requirements.
In terms of building envelopes, ASHRAE 189-2009 actually encourages the design of green buildings rather than just the "bare minimum" of energy efficiency and occupant comfort.
There are two ways to meet the updated OBC: the performance path and the prescriptive path.
The
performance path requires that a building be designed to achieve one of following:
•25% annual energy savings relative to the Model National Energy Code (this is essentially the prerequisite energy requirement for LEED).
•5% annual energy cost savings relative to ASHRAE 90.1-2010 (without the OBC envelope revisions)
•Lower annual energy cost relative to the OBC prescriptive code of ASHRAE 90.1-2010 with ASHRAE 189-2009 envelope revisions
This would need to be
demonstrated through an energy model that indicates what building features are improvements over the reference buildings (i.e., daylighting sensors, triple glazed windows, ultra-high-efficiency heating plants).
The prescriptive path will have some "real eye openers" for many design teams:
•no more than 40% glazing
•many common wall constructions, such as z girts and spandrel panels, will have challenges meeting the required insulation values
•very high performance double glazed fenestration systems, and sometimes even triple glazed windows are required
•heat recovery ventilation (whereby exhaust heat is used to preheat incoming fresh air) required in more building types