The past few years has seen an upward trend in the number of lawsuits due to poor indoor air quality (IAQ). These cases can prove to be very expensive and sometimes might not be even covered by your general liability insurance policy. As people are spending more and more time indoors, they are increasingly aware of the issues associated with poor IAQ and its affect on their health. According to the US Environmental Protection Agency (EPA), indoor pollution levels are much higher than outdoor levels.