[Equest-users] User Expression for Infiltration Neutral Zone Height

[Bishop, Bill]

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

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From: Equest-users <equest-users-bounces at lists.onebuilding.org> On Behalf Of Melissa Crowe via Equest-users
Sent: Tuesday, March 17, 2020 10:13 AM
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] User Expression for Infiltration Neutral Zone Height

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:image009.png at 01D5FC51.3BD960B0]

Thank you

[cid:image010.png at 01D5FC51.3BD960B0]
Melissa Crowe, LEED AP, BEMP
Senior Mechanical/Energy Engineer

[cid:image011.jpg at 01D5FC51.3BD960B0]

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Suite 305
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