Ducts located in attics can bring in cold dry air in winter, and hot, humid air in summer, dust, dirt and fibers from fiberglass insulation that is there to keep your house warm in winter and cool in summer.

It doesn't have to be this way.

Hiring right professional who uses duct diagnostic tools and good industry practices will put you on road to good indoor air quality and a more comfortable environment.

Ed Bishop is founder and president of Enhanced Living Inc., a Troy, NY-based design-consulting and contracting company. contracting. Trained in the “House Is A System” approach to HVAC design. He was formerly a building analyst instructor, providing certification training for New York's Home Performance with ENERGY STAR® program