Fruit and vegetables are largely composed of water. The loss of freshness is mainly due to a quick dehydration of the product, further to the evaporation of the water. Water evaporates, due to a difference between its values contained into the vegetables and in the surrounding air. By means of a misting system, the humidity level in the air re-establishes its optimal values, blocking the dehydration process. Additionally, a TecnoCooling fog system, following the adiabatic principle, reduces the temperatures and cools the products displayed at the counters. Fish products are also subjects to the loss of freshness by dehydration, as they are composed of water in the measure higher than 70%. Moreover, the misting system can control the spread of smells in the surrounding areas. Some types of meet,cold cuts and cheese are subjects to dehydration, too: our fog systems can restore naturally their suitable special microclimate, to preserve or keep seasoning them. Misting system can be easily assembled inside refrigerators and automatically checked by means of humidity control.