[Equest-users] NECB 2015 Question

Thu Mar 14 08:09:45 PDT 2019

Thanks you to all the respondents. I've had 3 consistent responses that in
fact the Reference window area is to be set to the maximum allowable in all
cases (for the NECB code), which I'll take as general (modeler's) agreement.

Cheers,
Chris

On Thu, Mar 14, 2019 at 10:47 AM Benjamin Zizi <bzizi at ecohabitation.com>
wrote:

> Good morning,
>
> That would be my interpretation too. It differs if it is more or less than
> the maximum permitted and should be adjusted for the reference as maximum
> permitted.This approach is different than with ASHRAE 90.1 and gives a
> significant advantage to projects with less windows than usual (which is a
> good thing). Same approach is taken with Energuide ratings : HOT2000
> software adjust the ratio of reference building as soon as the proposed
> building is outside the minimum and maximum ranges : 17% - 22%.
>
> This interpretation would also be confirmed by the LEED V4 Canadian ACP (
> https://www.cagbc.org/cagbcdocs/leed/LEED_v4_Canadian_ACP_Language_as_of_20170420.pdf
> <https://mandrillapp.com/track/click/30634852/www.cagbc.org?p=eyJzIjoiWW42Zi0wVWI5amt1SjNDblB3ODI3Uk12Wkc0IiwidiI6MSwicCI6IntcInVcIjozMDYzNDg1MixcInZcIjoxLFwidXJsXCI6XCJodHRwczpcXFwvXFxcL3d3dy5jYWdiYy5vcmdcXFwvY2FnYmNkb2NzXFxcL2xlZWRcXFwvTEVFRF92NF9DYW5hZGlhbl9BQ1BfTGFuZ3VhZ2VfYXNfb2ZfMjAxNzA0MjAucGRmXCIsXCJpZFwiOlwiNWY3OTIxYzMxNmYxNGMyY2IwZDRlOThmZTZkM2JhODdcIixcInVybF9pZHNcIjpbXCJlNDE5ZDNiNzViMjM2NjhhYTM0ZmMzYjYwZDViMzZhNWIxNzJhZTIxXCJdfSJ9>)
> that states that projects can use the NECB reference at some conditions,
> including :
>
> *Apply fenestration area convention similar to ASHRAE 90.1-2010 *
> Maintain the same FWR (as defined by NECB, including doors) for the
> Reference as exists in the Proposed Design, up to the prescribed maximum.
> If the Proposed Design’s FWR exceeds the prescribed FWR, scale down the
> fenestrations in the Reference case accordingly.
>
>
> However, NECB is quite unclear on this topic and it could be good to have
> an official guidance :)
>
> Benjamin Zizi
> Coordonnateur technique
>
> Évaluateur écologique et énergétique LEED Habitations
>
>
> Évaluations Écohabitation
> 6001, rue St-Hubert | Montréal QC | H2S 2L8
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>
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>
>
> Le jeu. 14 mars 2019 à 09:58, Kyle Anders via Equest-users <
> equest-users at lists.onebuilding.org> a écrit :
>
>> That's my interpretation, although I know of at least one local code
>> (Ontario's SB-10) that has modified this:
>>
>> [image: image.png]
>>
>> On Thu, Mar 14, 2019 at 9:46 AM Chris Hadlock via Equest-users <
>> equest-users at lists.onebuilding.org> wrote:
>>
>>> Good morning,
>>>
>>> This is a question for my follow Canadians that have experience with the
>>> NECB 2015 code.
>>>
>>> What is everyone's take on what fenestration area to model for the
>>> reference model when the Proposed model area is less than the maximum
>>> permitted?
>>>
>>> Specifically, I'm referring to Part 8.4.4.3.3) which states "If the
>>> total vertical fenestration and door area to gross wall area (FDWR) of the
>>> proposed building differs from the maximum permitted by Article 3.2.1.1.,
>>> the FDWR of the reference building shall be adjusted proportionally along
>>> each orientation until it complies with that Article."
>>>
>>> Do people interpret this as if my Proposed FDWR is say 20%, then my
>>> Reference FDWR is to be increased to say 40% (based on a Zone 5 climate)?
>>>
>>> Thanks,
>>> Chris
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>>
>>
>> --
>> Kind Regards,
>>
>> *KYLE ANDERS*, MASc, NRCan EA, LEED for Homes Green Rater
>>
>> *Senior Project Manager*
>>
>> *T* | 1-800-267-6830 x180   *C* | 226-220-2391
>> *F* | 519-658-6103               *E* | kyle at buildingknowledge.ca
>>
>>
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