Remodeling Your House? Have You Ever Considered Indoor Air High Quality? The cross-circulate air flow from one side to the other creates air change through your sub floor and replaces the air up to 15 events an hour throughout daytime. Research has confirmed that individuals get sick from dampness http://perth-northern-suburbs-el69780.aioblogs.com/49025421/recommendations-for-sub-floor-installation-installation-getting-to-the-answers