This existing Cast Iron boiler installation with gravity Hot Water primaries was extremely inefficient, Yeoman (SW) Ltd replaced the boiler with a new High Efficiency open vented boiler and upgraded the heating controls to be fully pumped and now incorporate room and cylinder thermostats.  Then the system received a Magna Cleanse Flush with Adey chemical cleaner to remove the built up iron oxide in the radiators before finally installing the Magna Clean filter and adding the inhibitor for the new Boiler and Heating Systems on going protection.