A serious concern for many homeowners is the presence of mold. Some suffer serious allergy problems in connection with mold exposure. Others may experience fatigue or other symptoms because of the material. If mold develops in your HVAC system, duct cleaning is recommended for ensuring that unseen material isn’t harbored out of view. In fact, the Environmental Protection Agency indicates that visible mold on hard surface ducts or on other parts of your HVAC system is an important reason for considering professional duct services. It’s important to note that lab testing may be needed to be sure that the material is actually mold. However, many homeowners prefer to be safe if any mold-like residue is spotted, scheduling appropriate cleaning services. It’s also important to recognize that moldy duct insulation needs to be replaced to prevent recurrence of the problem.