Think about your health and safety. PLC Windair will start the campaign “Terve Maja". Ventilation systems accumulate dust and grease when operating, which prevent clean air flow in the building. The layers of accumulated dust and grease create good conditions for ticks, fungi and other harmful micro-organisms to grow and spread. Occasionally, harmful micro-organisms can drop from the ventilation systems and get among people. Infections and diseases such as allergies, the flu and many others can easily move from a sick person to a healthy person through the ventilation.