After a hiatus of more than 20 year...

After a hiatus of more than 20 years, dual-facade theorys commonly used in European construction, are slowly reemerging in U buildings. novel examples include the Seattle Justice Center; Levine Hall, forward the University of Pennsylvania campus; Genzyme's corporate headquarters in Cambridge, Mass.; and the U headquarters of Canadian-based financial services firm Manulife, in Boston.

Double-wall schemes come in several basic types: externally or internally ventilated; internally air-tubeed internally extracted, and coupl to the building's HVAC system; and internally holeed ...