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

[bfountain at greensim.com]

Note that EE4 gives the error by exterior surface but the requirement was relaxed to the overall envelope as Luka pointed out. (Otherwise no çurtainwall building would meet the mandatory.)
Brian Fountain
bfountain at greensim.com

-----Original Message-----
From: "Matutinovic, Luka" <LMatutinovic at halsall.com>
Sender: bldg-sim-bounces at lists.onebuilding.org
Date: Fri, 12 Apr 2013 02:02:20 
To: Genest, Frederic<fgenest at pageaumorel.com>
Cc: bldg-sim at lists.onebuilding.org<bldg-sim at lists.onebuilding.org>; Joannette Jean-Gabriel<Jgjoannette at pageaumorel.com>
Subject: Re: [Bldg-sim] MNECB mandatory requirements 8.2.1.4.(2) for LEED
 Canada	compliance

Frederic,

This must be a very tall tower if the roof can't carry the entire envelope over the requirement. It does sounds like your options are to either beef up the roof insulation or add more glass (which admittedly sounds silly, but is compliant).

Luka Matutinovic (mobile)
Halsall Associates  

On Apr 11, 2013, at 4:37 PM, "Genest, Frederic" <fgenest at pageaumorel.com> 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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