Testing has uncovered an air conditioner that fails to live up to its energy-saving claims. The head of the Government's Energy Efficiency Office, Lam Kam-kuen, said yesterday it was the first time a sub-standard model had been found. 'We can't disclose the brand now as we are still liaising with the producer to see what has really happened,' Mr Lam said. 'But we will tell the public if their explanation is unacceptable.' More than 130 models of air conditioner have been awarded an energy efficiency label since 1996. Clothes dryers bearing labels showing how energy efficient they are will be available in shops in about six months. The labelling scheme - already used to rate fridges, air conditioners, washing machines and fluorescent lamps - will give dryers a mark out of five to help shoppers choose what to buy. From today, manufacturers, importers and local dealers can apply for their dryers to be tested and registered under the voluntary scheme. The applicants can then label their products accordingly.