Description of creating a Polish ventilator for patients infected with Covid-19 will be presented. The device is of lightweight structure, very easy to use and, above all, cheap to produce. It provides powerful diagnostic capabilities and has almost all existing ventilation modes. The apparatus is now fully functional mechanically, the tests on healthy volunteers and phantoms are coming to an end. Preparations are currently underway to conduct clinical trials on patients at the Medical University of Bialystok.