Intermittent exhausts are not a problem, constant exhausts can be disasterous. Look at my graph, some humidity spikes, they go right back down.
Originally Posted by paul42
The induced infiltration is coming in through path of least resistance not likely all 160 CFM for a clothes dryer comes in through your 6 inch intake even when the AHU is running, so you are sucking some through your walls as well as in from that vented attic of yours.
In some cases it will sweat in your wall cavity. The wall should have a drying process like permeable inside finishes and also the positive pressure cycle will resume and dry it out.
You guys are 30 years behind Canada on what it takes to build a tight house.
Last edited by Carnak; 06-23-2008 at 12:43 PM.