Ventilation and air conditioning units from AL-KO Air Technology offer the best quality “MADE IN GERMANY”, true to our motto: “QUALITY FOR LIFE.” This premium quality is also confirmed by numerous certificates from state-approved test centers. In addition to passing all the prescribed tests, AL-KO Air Technology also participates in other voluntary certification programs. Furthermore, the units also comply with the standards of the Herstellerverbands Raumlufttechnische Geräte e.V. [Manufacturers Association of Air Handling Units.] AL-KO Air Technology has been involved in this association of AHU manufacturers for many years.