Fans in the milch cow sheds enables a reduction of the stress derived from the heat, thanks to the improved speed of the air at animals level. They can either be installed on the walls, thus influencing the volume of air change, or within the shelter itself, where they guarantee a satisfactory ventilation, both in the feeding area and in the rest one.

In order to enhance the positive effects resulting from the artificial ventilation, it is necessary to adopt a cooling system for the animals. In the light of experience, the most effective solution has proved to be the wetting of the animals at intervals. The programmed alternation between the opening of the wetting-valves and the artificial ventilation system allows to cool the animals by evaporation, thus enhancing food consumption and reducing their stress considerably.

It would also be advisable to consider the arrangement of air-conditioning systems in the waiting rooms, where different solutions, depending on the peculiar needs, can be adopted: simple ventilation, cooling by means of direct wetting of animals or by a cooling system which, thanks to a special fan wheel micronizing water, is able to cool the whole indoor area, thus avoiding serious stress, which would lead in a very short time to a reduction of the production.