Mold is one of the worst contaminants that travels through the air ducts, as when it is inhaled, it can cause serious medical problems. Mold is usually present in areas that are dark most of the time, and there is a certain degree of moisture, and there is little moving air.
You would think that moving air is always happening, but the air in your system is not moving all of the time. Consequently, the mold has a chance to grow. Mold starts out as a tiny spore, floating through the air, looking for a spot to land.
The cleaning of the air ducts is quite simple, as a long, wide bristle brush is passed through the ventilation system, removing the majority of the dust and debris. Once this is done, your ducts are clean and fresh, and they no longer harbor unhealthy debris and dust.