The Goal of HVAC air ductwork cleaning is to remove visible contaminations such as dust, debris, and moisture from the entire air conveyance system, so that the air passes over the clean surfaces inside the existing ductwork ducts. Microbial contaminants such as bread mould, mildew and soil fungi which can be invisible to the naked eyes, should be remove from the HVAC duct system with proper cleaning and sanitizing procedures, to achieve health risk and comfort environments.