TRAM has installed ionising units in the air conditioning systems of all its vehicles that offer a completely harmless way to reduce the presence of dust particles, bacteria, viruses and odours in the air.

These units – equipped with what is known as needlepoint ionisation technology – release positive and negative ions that electrically charge the oxygen and nitrogen molecules present in the air on board the trams. These molecules then attach themselves to particles of dust, bacteria, viruses and odours which, depending on the type, are either destroyed, fall to the ground or are trapped by the filter.

After a pilot test carried out in 2022 involving direct reading tests, active collectors and passive collectors, it was concluded that ionisation is capable of reducing the concentration of particles present in the air by between 80% and 95%. Now, all the city’s trams are equipped with this technology.