Financial experts from MoneySavingExpert ( MSE ) have urged households to install a valve costing around £10 to help reduce the cost of their bills. The MSE team, founded by Martin Lewis , suggested: "Make sure you control which rooms you heat, so you're not wasting cash heating empty rooms. "You can simply go round the house and turn down the radiators in the rooms you don't want to heat. Smart Energy GB says you could save around £40 a year turning radiator valves down to the midway point, in