SecondI nt er at i on I nt hesecondi nt er at i on,wer evi ewedt hei nnerwor ki ngoft het ubeanddeci dedt hatt hecompr essi oni nt hecent r alar eamadei tdi f f i cul tt ogetvi ewsoft hel akeandt hehar borf r om t he opposi t esi desoft hebui l di ng.Wet hecr eat edawal lsyst em t osuppor tt hepr ogr ammi ngi n whi chnoel ement sper pendi cul art ot het ubewer eopaquet her ef or eal l owi ngsweepi ngvi ews f r om anypoi nti nt hebui l di ng.Weal sodevel opedt hesuppor t i ngcubet oser veasacent r al wi ndent r ypoi ntf orpassi vevent i l at i on.