The cost of using electrical items, such as tumble dryers, can be one of the greatest household expenses. For this reason, companies offering to reduce the amount of money spent yearly on such items are of increasing popularity. An example of this is provided by the website sus-it.net, which promises to save consumers up to £690 a year by following its simple tips. These tips range from changing your appliances to energy-saving options, to insulating and building advice. Such sites often provide a comparison of the usual running cost or products, allowing consumers to compare models and assess their expected savings. For example, according to the information provided by sus-it.net, a Panasonic NA washing machine can save an average of £32.80 a year compared to other models.