In order to obtain satisfactory energy efficiency and environmental compatibility, a household tumble dryer (1) is proposed that includes a drying chamber (2) adapted to accommodate therein objects (3) to be dried. A first circuit is provided for impinging the drying chamber (2) with a drying medium (4). The dryer further includes a heat pump (5) with a second circuit for circulating a heat exchange medium. The first and second circuit are coupled in a heat exchanging manner. The heat exchange medium is of a hydro-fluoro-olefine type.
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