Shelter Cooling is a cooling product to be installed in the exterior body of the room or telecommunications enclosures. The design and installation method of this product is such that it creates a suitable IP for the internal equipment of the room or compartment during the operation of the device. This cooler is from gas type and contains all the air conditioning circuit equipment including condenser, compressor, evaporator, safety valve and the other accessories. In order to increase the energy efficiency of this product, a free cooling option has been provided on it, which, if implemented, can use the coolness of the outside air to dissipate the heat of the internal equipment of the room and the compartment, in such a way which reduces the working hours of the compressor and consequently its electricity consumption. This product can be a suitable solution for mobile and container telecommunication centers.