Due to condensation in evaporator coils in the summertime, moisture and humidity build-up inside Fan Coil Cabinets. Lack of proper maintenance and annual cleaning allow mould to accumulate over time inside your unit. Since moisture and humidity feed mould to grow. Hence, this matter becomes a huge issue in the long term for residents inside the unit. More importantly, exposure to mould can cause respiratory problems, skin rash, red eyes, asthma and difficulty breathing.