[Bldg-sim] MNECB mandatory requirements 8.2.1.4.(2) for LEED Canada compliance

[Chris Jones]

Frederic
This error was relaxed for the CBIP program, EE4 
CBIP gives a warning message.  The CaGBC has 
followed the CBIP convention and accepts projects 
where the U-value is higher than 167% of the 
Reference case opaque envelop value.

At 04:37 PM 11/04/2013, Genest, Frederic wrote:
>Dear fellow Canadian energy modellers.
>
>We are involved with the energy modeling of a 
>residential glass tower which aims at a LEED Canada-NC certification.
>
>The building envelope is mostly curtain walls 
>with limited amounts of opaque components 
>(spandrel panels among them). When running the 
>model, EE4 gives us an error message saying the 
>building doesn't meet the mandatory requirement 
>8.2.1.4.(2), which means that the proposed 
>building opaque envelope components (walls and 
>roofs) have an overall U-value higher than 167% 
>of the reference building overall U-value.
>
>Normally, not meeting a mandatory requirement 
>means the building cannot be certified for LEED Canada.
>
>We are trying to find if the CaGBC has generally 
>been lenient about this requirement or not..? I 
>can't find a CIR, or other source / example saying so.
>
>Of course, among the ways around would be to 
>design and model the building against ASHRAE 
>90.1... but that would means checking against a 
>whole new set of mandatory prescriptions, and 
>completely reworking the energy model. Which we are trying to avoid.
>
>Another way is to remove all offending spandrel 
>panels and replacing them with regular glass 
>component. Not sure how the architect will take this.
>
>Any input / help on this is appreciated.
>
>Frédéric Genest,
>
>Pageau Morel et associés inc.
>
>ing., M.Sc.A., PA LEED BD+C / Eng., M.A.Sc., LEED AP BD+C
>ASHRAE HBDP
>Chargé de projet / Project Manager
>Associé / Associate
>fgenest at pageaumorel.com
>
>210, boul. Crémazie O., bur. 110
>Montréal (Québec) H2P 1C6
>T 514.382.5150 (2203)
>F 514.384.9872
>www.pageaumorel.com
>
>
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 >>
Christopher Jones, P.Eng.
Suite 1801, 1 Yonge Street
Toronto, ON M5E1W7
Tel. 416-203-7465
Fax. 416-946-1005
email cj at enersave.ca
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