Under a new EU regulation, from September next year, all vacuum cleaners sold in the EU will be rated according to their performance and energy efficiency, on a scale from A to G. Dyson has launched a judicial review of this in the European General Court in Luxembourg. This is because they argue that the rating system is flawed. Cleaners are to be rated on their energy usage in dust-free laboratory conditions, and this favours old style vacuums with bags, rather than the bagless models produced by Dyson. The company argues that in real-life conditions, their machines are more energy efficient because they did not clog with dust and hence waste energy. Moreover they are more environmentally friendly because they do not use bags.
Source: BBC News