Abstract: An installation is provided for defrosting or tempering frozen food products. The installation includes a chamber to receive the food products; ventilation means to establish air circulation in the chamber at a speed greater than or equal to 5 m/s; means of heating the food products in the chamber; an installation water supply configured to be connected to a domestic water network for receiving network water; at least one refrigeration unit to cool the network water to a desired temperature; means for cooling the air in the chamber that includes means for misting, showering or spraying the cooled water into the chamber; and means of regulating the temperature of the cooled water to a set value chosen as a function of at least one of time, a core temperature of the food products, or a surface temperature of the food products.