Ventilation device

An apparatus for heating air in a confined space, the apparatus comprising:

• a first module having an outlet adapted to be disposed in the confined spaced, said first module having an external tube that protrudes rearwardly from the outlet of said first module, said first module having an internal tube axially disposed inside the outlet and inside the external tube, the internal tube defining a first axial conduit, the outlet of said first module having openings adapted to introduce air toward a first air gap between the internal tube and the external tube of said first module;
• a second module having an outlet adapted to be disposed outside the confined space, said second module having an external tube that protrudes frontally from the outlet of said second module, said second module having a shank disposed inside, the outlet of said second module, said second module having an internal tube that protrudes frontally from the shank, the internal tube of said second module axially disposed inside the external tube of said second module and defines a second axial conduit, the outlet of said second module having openings adapted to introduce air toward a second air gap between the internal tube of said second module and the external tube of said second module;
• a first fan disposed at a front end of the first axial conduit of the internal tube of said first module so as to extract air from the first axial conduit and to introduce air to the confined space;
• a second fan disposed in the shank of said second module so as to extract air from the second axial conduit of the internal tube of said second module and to discharge air exteriorly;
• a heat exchanger disposed in the first air gap of said first module, said heat exchanger having first conduits for a passage of air interiorly to exteriorly and having second conduits for a passage of air exteriorly to interiorly;
• a filter disposed in the first axial conduit of said first module in front of said first fan so as to filter air introduced to the confined space;
• a radon detector adapted to detect a presence of radon in the confined space;
• and
• a control unit connected to said radon detector so as to receive information as to the presence of radon in the confined space, said control unit comprising a comparator that compares concentration of radon detected by said radon detector with a threshold value stored in the comparator, said control unit being connected to said first fan and to said second fan so as to activate said first fan and said second fan when said radon detector detects the concentration of radon in the confined space that is higher than the threshold value, wherein said first module and said second module are telescopically coupled, wherein the external tube of said second module is slidable on the external tube of said first module, the internal tube of said second module is disposed inside the internal tube of said second module so as to define the second air gap such that said first module can slide with respect to said second, module in order to adjust a thickness of a wall that separates the inside from the outside.