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

Jones, Christopher Christopher.r.Jones at wspgroup.com
Thu Oct 15 10:15:03 PDT 2015


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?


[cid:image003.png at 01D09C46.E75BA0D0]
Christopher Jones, P.Eng.
Senior Engineer

WSP Canada Inc.
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