Mandatory energy labelling of domestic appliances has existed in the EU since 1995. The labelling covers lamps, ovens (since 2003), refrigerators (since 1995), freezers, washing machines, tumble-dryers and dishwashers (since 1999). Energy labelling aims to make it easier for consumers to access information on energy-using products in order for it easier for them to choose more energy-efficient goods, as well as to stimulate the development of more energy-efficient technology. The Swedish Energy Agency has the authority to ensure that the energy labels are used. Stores that do not follow the regulations can be fined by up to SEK 200 000. Voluntary energy labelling of energy-efficient windows has also been in place in Sweden since 2006, with labelling identical to that used for appliances. In 2009, 14 manufacturers had energy labelled windows. The U-value of a window in Class A (highest efficiency level) should be 0.9 W/m2K or below.