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| | The current legislation in England and Wales states, that from 1 April 2005, all Gas-fired boiler installations in new or existing properties, must be condensing boilers (rated SEDBUK Band A or B). SEDBUK - Seasonal Efficiency of Domestic Boilers in the UK is the preferred measure of the efficiency of a boiler installed in typical domestic conditions, and is used in SAP assessments and the building regulations. Although SEDBUK is expressed as a percentage, an A to G scale of percentage bands has also been defined this is much the same as you would see on a washing machine. |