SEDBUK stands for Seasonal Efficiency of Domestic Boilers in the UK and is a Government sponsored database for domestic gas and oil boilers both old and new. It enables consumers and engineers to choose an appliance based upon its efficiency and is the nearest thing the heating market has to an energy labelling system.

Band	SEDBUK Range (% efficiency)
	over 90%
	86%-90%
	82%-86%
	78%-82%
	74%-78%
	70%-74%
	below 70%