Since we have a good thread going with expressions, I'll share an expression that assigns GLASS-TYPE based on WINDOW-TYPE and window orientation. In this case, south-facing windows (180 degrees, +/- 20 degrees) are assigned their own glass type. The part of the expression that determines orientation (in bold) can be used in other expressions for WINDOW keywords as you see fit.
~Bill
GLASS-TYPE =
{if(#L("WINDOW-TYPE")!=#SI("STANDARD","WINDOW","WINDOW-TYPE"))
then #SI("2Dome Acrylc White, Alum no Brk", "WINDOW", "GLASS-TYPE") else
if(#L("WIN-SPEC-METHOD")==#SI("GLASS-TYPE-INPUT","WINDOW","WIN-SPEC-METHOD"))
then if (ABS(#CDN(#P("AZIMUTH")+#P2("AZIMUTH")+
#G("BUILD-PARAMETERS","AZIMUTH"), #P("TILT")) - 180) <20)
then #SI("Type South U .19 SHGC .58", "WINDOW", "GLASS-TYPE")
else #SI("Type Other U .22 SHGC .36", "WINDOW", "GLASS-TYPE") endif
else unused endif endif}
William Bishop, PE, BEMP, BEAP, CEM, LEED AP | Pathfinder Engineers & Architects LLP
Senior Energy Engineer
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bbishop at pathfinder-ea.com
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