http://hwcdn.libsyn.com/p/c/7/c/c7c82959d816327d/BuildingPerformance33-LewHarriman.mp3?c_id=5012376&destination_id=14420&expiration=1476583667&hwt=f23360bced4c0

http://hwcdn.libsyn.com/p/c/7/c/c7c82959d816327d/BuildingPerformance33-LewHarriman.mp3?c_id=5012376&destination_id=14420&expiration=1476583667&hwt=f23360bced4c0559a85ce1b766cbadb9 http://hwcdn.libsyn.com/p/c/7/c/c7c82959d816327d/BuildingPer... Looks like it becomes a bigger problem as buildings become more airtight. Something to do with peak dewpoint in makeup air being all wrong, not sure because I'm not a HVAC expert.