DUCTZ Indoor Air Professionals to Educate Homeowners About Importance Of Indoor Air Quality on Hit Television Show Designing Spaces Mequon, WI. 04/30/2008 - The Environmental Protection Agency ranks poor indoor air quality among the top five environmental risks to public health, and surprisingly, the levels of air pollution in the home can be two to five times higher than outdoor levels. Because the biggest source of contaminants comes from a home's mechanical system, Designing Spaces invited Ductz® Indoor Air Professionals, to help educate viewers on how they can ensure a healthy home environment. The show was aired nationally on Women's Entertainment Network (3 comments)