Thousands of consumers could be in line for compensation after various tests found some domestic appliances use more energy than they claim.
The National Measurement and Regulation Office (NMRO) and MarketWatch, an EU-funded programme, are carrying out separate tests on home electrical appliances after several high street brands of washing machines, TVs and dishwashers were found overstating their energy efficiency ratings.
Stewart Muir, certification manager at Energy Saving Trust, said:
"These energy consuming products and appliances cost money to run and ultimately we want to make sure the customer isn't left out of pocket. But we have found that a number of products sold in the UK do not match their energy efficiency claims.
"We are testing products to reveal their true energy efficiency performance and whether they are as energy efficient as their energy label suggests."
Some goods manufacturers are already compensating their customers, with owners of a particular model of Miele freezers receiving £50 in vouchers after it emerged the product had an energy efficiency rating of A+, not A++ as advertised.
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