Upgrading this 20 year old, cast iron Potterton Suprima to a new Sedbuk ‘A’ rated Vaillant EcoFIT Pure condensing boiler. This installation was a straight forward boiler change and Magna Cleanse power flush, but with the addition of thermostatic Radiator valves combined with the high efficiency of the new Vaillant, we expect our customer to see huge savings on their energy bills.