Hi All
Help please, I am struggling with User Expression that calculates the Neutral Zone Height for high rise infiltration. It's something like:
((Parent("Z")-0)+Local("Height")/2)*-1+(BH/2 - BG)
Where:
BH = Building Height
BG = Total of Below Grade FL to FL Height
Also the default expression includes a switch statement. I don't thin I need a switch statement, so how is it formatted?
[cid:image002.png at 01D5FC44.8B3B4270]
Thank you
[cid:image003.png at 01D5FC44.8B3B4270]
Melissa Crowe, LEED AP, BEMP
Senior Mechanical/Energy Engineer
[cid:image001.jpg at 01D5FC3E.6F425E10]
Boston Office
161 Worcester Road
Suite 305
Framingham, MA 01701
508-647-9200 ext. 1225
www.cmta.com
Follow us on Facebook
We've moved! Our new location is noted above - please update your records.
Look for an invitation to our Open House event to showcase the new space in the coming months.
Hi Melissa,
Try this expression for NEUTRAL-ZONE-HT:
switch (#SV(#L("INF-METHOD")))
case 0 : unused
case 1 : unused
case 2 : NPL-(#P("Z")+#P("FLOOR-HEIGHT")/2)
case 3 : unused
case 4 : unused
default : unused
endswitch
Calculate the neutral pressure level for your building and replace "NPL" in the expression with the calculated value.
Regards,
~Bill
William Bishop, PE, BEMP, BEAP, CEM, LEED AP
Senior Energy Engineer
[Pathfinder-EA-logo-2]T: (585) 698-1956 F: (585) 325-6005 www.pathfinder-ea.com
bbishop at pathfinder-ea.com
134 South Fitzhugh Street
Rochester, NY 14608 [cid:image008.png at 01D5FC51.3BD960B0] Ask me why Carbon Fee & Dividend may be right for you.
Bless you ~Bill!
Melissa Crowe, LEED AP, BEMP
508-647-9200 ext. 1225