Vacuum cleaner installations

摘要

A vacuum cleaner installation has a unit 1 with an outer housing 10 installed within the thickness of an outside wall 2 of a room 3. The housing 10 contains a blower 20, a bag 25 for waste material and a hose 29. The blower 20 is connected to draw waste material along the hose 29 and into the bag 25, the exhaust air venting externally of the room through a grille 30 on the outside wall.