The Drentech Anemos is a compactly-designed, functional device for balanced pneumonectomy drainage that offers complete solution for post-operative drainage procedures. It favors return of thoracic mediastinic equilibrium after total lung resection procedure. Pneumonectomy balanced drain maintains pleural cavity pressure between +1 and -13 cmH2O. It's composed of three chambers: a collection chamber with 2 liter capacity and two underwater valves for controlling both negative and positive pressure. Its first underwater valve maintains max level of negative pressure at -13 cmH2O while the second underwater valve maintains max level of positive pressure at +1 cmH2O. Contamination is prevented with antibacterial filters positioned on both underwater valves. Its compact design improves stability, saves space and facilitates easy transportation and patient movements.