The Watermill, on the other hand, checks its environment every three minutes to
determine the dew point and keeps itself operating at just a few degrees below that dew point.
Applicability — all hygro - thermal regions except subarctic / arctic — in cold and very cold regions the thickness of the foam sheathing should be
determined by hygro - thermal analysis so that the interior surface of the foam sheathing remains above the
dew point temperature of the interior air (see Side Bar 2)