Abstract: A piece of furniture whose supporting structure is formed by peripheral walls and a base wall is supported by feet and wheels, has a rectangular cross-section and is closed by a tray-like covering element at its upper end. The piece of furniture is divided into at least two spaces, one of which is sealed and the other contains an annular blower, driven by an electric motor, and also a tank with a vertical axis, at whose upper end a filter is introduced. A suction duct leads to the aperture of the tank, and terminates on the outside forming a pipe union for the connection to a flexible tube which ends into a hose. The suction aperture of the blower is connected to the tank by way of a duct which ends into the tank below the filter, whereas the emission aperture of hot air under pressure of the blower is connected to the duct which projects out of the piece of furniture forming a pipe union for the connection to a flexible linking tube, which ends into a hose.