The Invisivent UT is a self-regulating window vent with a basic sound absorption level up to 34 dB (0;-1). This model is suitable for non-residential buildings (office buildings, schools, etc.), and can achieve very high air flow rates. The self-regulating valve only comes into effect at a wind pressure of 10 Pa, which means that there is a permanently higher level of basic ventilation. This window vent is only suitable for non-residential buildings where natural supply and mechanical extraction of fresh air are located in the same room.