Absolutely, the answer is YES. Construction debris is one of the most common types of contamination that we find in air duct systems. During construction, the ductwork is wide open and the air handler is often run without a filter.Those little debris, such as pieces of plaster, wood, dust, insects, insulation as well as other materials, could make their way into your system and are accumulated during the time of dustwork. The only way to thoroughly remove all of these pollutants from your air duct systems is to choose professional cleaning to clean the entire system at one time.