The oxygen concentrator will take in oxygen from the surrounding room and then compress the air. There is a cooling mechanism inside of the device, which ensures that it will not overheat. The machine then removes the nitrogen from the air tanks to the filter and the sieve beds. It can then deliver the purified oxygen through a mask or nasal connection. This works very simply, but it can be extremely effective for those patients who are in need of additional oxygen, and it is more convenient than a tank.