All houses should have some air leakage, but most leak too much. Symptoms of excessive leakage include uneven temperatures throughout the house, wasted energy, excessive dust, cold drafts, dry air in winter, and clammy air in summer. On the other hand, some homes are too airtight and may have unhealthy indoor air.
To measure a home’s air tightness, Department of Energy scientists at Princeton University invented the blower door instrument, which is often featured in magazines and on television, including National Geographic, Better Homes and Gardens, Popular Science, and This Old House. Using an Infiltrometer™ (a computerized blower door system), your Comfort & Indoor Air Quality Consultant will evaluate how leaky or airtight your entire home is and where improvements can be made.