Mold plays a role in exacerbating the allergies in the home. They release vast quantities of spores when they mature and quickly spread in the air. The mold spores can stay airborne almost indefinitely and can attach themselves onto any surface. They will thrive if the surface they attached to provides nourishment and a conducive environment for their growth. The moist areas in the home are ideal habitats for the mold to thrive in. They can even be found in the air ducts of the home ventilation system. Some air ducts have condensation problems due to moist air or a breach in the ducting. The mold will attach themselves especially if the duct work has a layer of dust on it. If you are experiencing a heavy growth of mold in the home air ducts , it is best to get it cleaned. Air duct professionals are experts at removing mold.