Wed 14 AugWednesday 14 AugustWed 14 Aug 2024 at 10:28pm"Heating and cooling costs are about 40 per cent of your total energy bill, and fixing leaks can reduce that by 20 per cent," he said."Leakages were found in most new homes, mainly from bathroom fans, sliding doors, and poor or missing door seals," Mr Ambrose said.