The isothermal humidification process involves
introducing water vapour into the environment, which is generated by boiling
water. This procedure requires an external source of energy
to change the state of the water. As the mass of the water vapour is much lower than the mass of the
air it is absorbed into, the temperature of the air increases slightly, and for
this reason it is improperly called isothermal humidification. Steam humidifiers ensure maximum hygienic safety, as
the temperature of the steam ensures the absence of any potentially harmful
Adiabatic humidification The adiabatic humidification process involves the direct evaporation of water in the air without the addition of energy from the outside: the water is finely atomised to maximise the heat exchange surface and then introduced into the environment.? The heat required for vaporisation is not supplied by external sources, but rather by the air being humidified, which as a consequence is cooled.? The power consumed by the mechanical action of adiabatic humidifiers is therefore quite low.
Spontaneous evaporation of the finely atomised water absorbs energy, reducing air temperature. Evaporative cooling may be direct or indirect, the latter without increasing the humidity of the air. This gives an effective cooling system with very low power consumption.