The Air conditioning system is the main source of air we breathe in indoor environments. Maintaining and cleaning the system ensures the health and wellbeing of the occupants. Over time the cooling and heating coils are clogged with contaminants like bacteria, fungi and mold creating a toxic organic fragments known as MOD (Macromolecular Organic Dust). This dust is linked to all the health and discomfort experienced by the occupants. Regular cleaning and treatment of coils contributes to a healthy indoor environment.