PS 101 Through-the-Wall Passive Vent is a cost effective and highly efficient ventilation kit that provides an economical ventilation solution for wide range of applications where centralized ventilation is not applied but air exchange is needed. Fresh air exchange significantly reduces the presence of harmful substances such as dust, smoke, fumes and dampness, which can pose risks to human health. PS 101 is designed for constant ventilation and to supply fresh air into premises without the need of duct work or power supply. It is installed in the outer wall of any premises being residential or commercial. The unique design of the internal grille and air flow regulator prevent backdraft and allow the airflow intensity to be adjusted. G3 cleaning level filter ensures filtration of incoming air, preventing the entry of dust and fumes. The wall vent consist of a telescopic pipe, a vent with adjustable airflow regulator, a G3 filter and an outside vent cover outside vents cover.