Society is becoming more and more aware of the importance of breathing clean air which is free of pollutants, and particles, microbes, bacteria and other materials in suspension that can cause serious, and even chronic illnesses.

Fortunately, there is a general worldwide trend towards approving laws to regulate the maintenance and hygiene of air-conditioning systems.

The World Health Organization has defined the Sick Building Syndrome (SBS) as a group of conditions caused by the contamination of the air in enclosed spaces, which may be caused by particles in suspension, mould, microbes or bacteria Proper maintenance of air-conditioning systems, based on current legislation is the best way to ensure the indoor air quality.