You can wash extra energy-efficiently with a Siemens dryer with a C energy label, which is good for your wallet and the environment. Thanks to the lower drying temperature, you consume less water and energy. As a result, your energy bill is lower. Which load capacity should your heat pump dryer have? If you want to wash large loads of laundry like bedding, choose a Siemens dryer with an 8kg load capacity or more. For smaller loads of laundry, a 7kg load capacity is enough.