The HYBALANS+ calculator tool has been conceived and developed as a software to design a ventilation system that offers a high quality indoor air inside the environments. The HYBALANS+ allows the dimensional verification calculation of the whole air ventilation system. Thanks to an interactive guide and to a “tree” function display, it allows selecting the most appropriate air extraction and air intake ducts in the fastest and easiest way. HYBALANS+ allows exporting to EXCEL the material list to carry out the ventilation system that has been designed. HYBALANS+ is a complete working tool for both the installer and the designer. The STABILE Technical Department ensures you a full support from the download to the final design.