Glass's Information Services claims that even with temperatures dropping, dealers remain cautious about buying cars without air-con for their stock.
Jeff Paterson, senior car editor at Glass's, said: 'Right across the market buyers are shunning cars that don't allow them to escape the heat. Although temperatures are now easing, dealers remain very cautious about adding cars without air-conditioning to their stock. In addition, the premium for a family-sized hatchback or saloon with air-con before the heatwave would normally be about £200, but that figure is now nearer to the £500 mark.'
Air-con is becoming a minimum requirement when customers are looking to buy a used car, he said. Paterson added: 'Even small vehicles at the budget end of the market, such as the Daewoo Matiz, now include it. As a result, the increased premium over non-air cars may well stay in place during the winter months.'