Module for hosting at least one information technologies equipment item generating, in its operation, heat that is dissipated inside the module, the module comprising at least one composite wall comprising, from the inside to the outside of the module: • a first layer of heat-conducting materials, allowing heat loss from the inside to the outside of the module, • a second layer of thermally inert materials; said second layer being separated from said first layer by a space allowing the flow of outside air between said first and second layers and an exchange of heat by convection between the first layer and the second layer , the outside air remaining contained between the first layer and the second layer without penetrating inside said module; said thermally inert material having a significant thermal inertia for storing cold during periods during which the temperature of the outside air introduced is below the temperature inside the module, to exploit it during the periods during which the temperature of the outside air is higher than the temperature inside the module, said module further comprising: - input/output means for the outside air in the space between the first layer and the second layer, said input/output means being capable of being opened or closed as a function of the outside temperature; and - forced convection means , disposed at the input or at the output of the outside air input/output means , and controlled as a function of the temperature difference between the temperature of the outside air and the temperature inside the module. • a first layer of heat-conducting materials, allowing heat loss from the inside to the outside of the module, • a second layer of thermally inert materials; said second layer being separated from said first layer by a space allowing the flow of outside air between said first and second layers and an exchange of heat by convection between the first layer and the second layer , the outside air remaining contained between the first layer and the second layer without penetrating inside said module; said thermally inert material having a significant thermal inertia for storing cold during periods during which the temperature of the outside air introduced is below the temperature inside the module, to exploit it during the periods during which the temperature of the outside air is higher than the temperature inside the module, said module further comprising: - input/output means for the outside air in the space between the first layer and the second layer, said input/output means being capable of being opened or closed as a function of the outside temperature; and - forced convection means , disposed at the input or at the output of the outside air input/output means , and controlled as a function of the temperature difference between the temperature of the outside air and the temperature inside the module. - input/output means for the outside air in the space between the first layer and the second layer, said input/output means being capable of being opened or closed as a function of the outside temperature; and - forced convection means , disposed at the input or at the output of the outside air input/output means , and controlled as a function of the temperature difference between the temperature of the outside air and the temperature inside the module. <EOS>