[Bldg-sim] ASHRAE 90.1 Window to Wall area definition

[Elizabeth Gillmor]

It would have to be heated enough to qualify per Table 3.1, which would be
pretty high:

[image: Inline image 1]

And then you would have to insulate it like a conditioned space (rather
than just a semi-heated space).  But yes, then you could count it!

*Elizabeth Gillmor  PE, BEMP, LC, LEED AP*

*e n e r g e t i c s  **consulting engineers, llc*
energetics-eng.com
c 303.619.0091

On Thu, Oct 15, 2015 at 12:24 PM, Jones, Christopher <
Christopher.r.Jones at wspgroup.com> wrote:

> So up here in Zone 6 and 7 where the first level of parking below grade is
> often heated enough to make it a conditioned space, one would count those
> below grade walls in the WWR for the Energy Cost Budget method.  That can
> make a somewhat significant difference in how much glazing the baseline
> case has in the above grade walls.
>
>
>
>
>
> [image: cid:image003.png at 01D09C46.E75BA0D0]
>
> *Christopher Jones,* P.Eng.
> Senior Engineer
>
>
>
> *WSP Canada Inc.*
>
> 2300 Yonge Street, Suite 2300
>
> Toronto, ON M4P 1E4
> T +1 416-644-4226
>
> F +1 416-487-9766
>
> C +1 416-697-0056
>
>
>
> www.wspgroup.com
>
>
>
> *From:* Elizabeth Gillmor [mailto:elizabeth at energetics-eng.com]
> *Sent:* Thursday, October 15, 2015 2:07 PM
> *To:* Shaun Martin
> *Cc:* Jones, Christopher; bldg-sim at lists.onebuilding.org
> *Subject:* Re: [Bldg-sim] ASHRAE 90.1 Window to Wall area definition
>
>
>
> That is a great point. Appendix G is different from the prescriptive
> requirements.
>
>
>
> The prescriptive requirements (and thus Energy Cost Budget method) allow
> you to count below-grade conditioned walls as per section 5.5.4.5 as part
> of your "gross wall area", while Appendix G specifically says above-grade
> walls only.
>
>
>
>
> *Elizabeth Gillmor  **PE, BEMP, LC, LEED AP*
>
>
>
> *e n e r g e t i c s  **consulting engineers, llc*
>
> energetics-eng.com
>
> c 303.619.0091
>
>
>
> On Thu, Oct 15, 2015 at 11:38 AM, Shaun Martin <
> smartin at shaunmartinconsulting.com> wrote:
>
> Page 213 of 90.1-2010 says “above-grade”
>
>
>
> Shaun
>
>
>
> Shaun Martin LEED-AP, BEMP
>
> Principal
>
> Shaun Martin Consulting
>
> #90 – 425 Carrall Street
>
> Vancouver, BC  V6B 6E3
>
> p. 604-789-1095
>
>
>
>
>
>
>
> *From:* Bldg-sim [mailto:bldg-sim-bounces at lists.onebuilding.org] *On
> Behalf Of *Jones, Christopher
> *Sent:* Thursday, October 15, 2015 10:15 AM
> *To:* bldg-sim at lists.onebuilding.org
> *Subject:* [Bldg-sim] ASHRAE 90.1 Window to Wall area definition
>
>
>
> I know this question has been asked before but I could not find a related
> thread.
>
>
>
> 90.1 states that the WWR is based on the gross wall area and the
> definition of gross wall area includes below ground walls as well as above
> ground walls..  Including the below grade walls can make a significant
> difference in the WWR for typical urban high rise buildings with a number
> of below grade parking floors.
>
>
>
> Can someone confirm that the WWR calculation is based on above grade wall
> area plus below grade wall area?
>
>
>
>
>
> [image: cid:image003.png at 01D09C46.E75BA0D0]
>
> *Christopher Jones,* P.Eng.
> Senior Engineer
>
>
>
> *WSP Canada Inc.*
>
> 2300 Yonge Street, Suite 2300
>
> Toronto, ON M4P 1E4
> T +1 416-644-4226
>
> F +1 416-487-9766
>
> C +1 416-697-0056
>
>
>
> www.wspgroup.com
>
>
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> If you are not the intended recipient or the person responsible for
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