Indoor air pollution is an issue of growing concern and increased visibility. Many companies are marketing products and services intended to improve the quality of your indoor air. However, if you decide to have your heating and cooling system cleaned, it is important to make sure that the service provider is a state certified HVAC contractor that could clean the air handler coils, cabinets, replace plenums, seal and replace damaged ducts if needed. Sealing air leakage in ducts can help save energy on heating and cooling bills.
You should have your air ducts cleaned if they are visibly contaminated with substantial:
Evidence of mold on the duct system can be a potential health problem as it effects symptoms associated with mold exposure including allergic reactions, asthma and other respiratory complaints.