The Helios Fans WES 150 is a complete wall installation kit designed for 150 mm fans. It consists of two interlocking plastic tubes that form a telescopic wall sleeve, suitable for flush-mount installations with wall thicknesses from 260 mm to 500 mm. The exterior wall outlet can be finished with either a frame featuring five self-closing louvres or a frame with a fixed grille insert. All components are made of durable plastic and are included with the kit, providing a practical and efficient through-wall fan mounting solution.