A window ventilator is a passive air inlet integrated into the window frame, sash, or façade system that facilitates controlled natural ventilation driven by wind-induced pressure differences and thermal buoyancy effects.

These window vents include sound absorption D_n,e,W  according to EN ISO 717 in open position from 27 to 42 dB.

The airflow rate (at 1 Pa) varies from 7 to 80 m³/h.m.