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

Elizabeth Gillmor elizabeth at energetics-eng.com
Thu Oct 15 10:36:37 PDT 2015


Unconditioned parking garage would not contribute to your WWR.  Only
conditioned underground space should be counted.

*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 11:34 AM, Jones, Christopher <
Christopher.r.Jones at wspgroup.com> wrote:

> The 90.1-2007 User’s Manual, example 5-K indicates the same rule.
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> [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:* Bldg-sim [mailto:bldg-sim-bounces at lists.onebuilding.org] *On
> Behalf Of *David Eldridge
> *Sent:* Thursday, October 15, 2015 1:27 PM
> *To:* bldg-sim at lists.onebuilding.org
> *Subject:* Re: [Bldg-sim] ASHRAE 90.1 Window to Wall area definition
>
>
>
> Example 5-Q in the 90.1-2013 User’s Manual still uses both above-grade and
> below-grade walls as “exterior walls” for determining gross wall area.
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>
> David
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> David S. Eldridge, Jr., P.E., LEED AP BD+C, BEMP, BEAP, HBDP
>
> *Grumman/Butkus Associates*
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> *From:* Bldg-sim [mailto:bldg-sim-bounces at lists.onebuilding.org
> <bldg-sim-bounces at lists.onebuilding.org>] *On Behalf Of *Jones,
> Christopher
> *Sent:* Thursday, October 15, 2015 12:15 PM
> *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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