These units if installed on existing buildings, they guarantee the energy upgrading of the system through the management of the air exchange without additional charges. On new installations, on the other hand, the air exchange is completely carried out allowing to reduce the size of the main air conditioning system.
In the intermediate seasons the building will benefit from the free or partial cooling generated by these units, which during the partial load phases allow the main system to operate with higher efficiencies. Moreover, these units allow to guarantee a support to the air conditioning system in the intermediate seasons by exploiting the free-cooling or free-heating periods.