Electricity prices have been increasing in the US and there doesn’t appear to be an end in sight – for example, California residential electricity prices went up by 30% from 2006-2012, and are projected to increase by another 47% over the next 15 years, according to the Energy D

Improving air infiltration has often been a matter of “working around” air leakage with heating and air-conditioning system designs rather than fixing the source of the problem. Understandably so, as methods of building air tightness can be complicated or costly; however, avoidance is