SEDBUK stands for 'Seasonal Efficiency of a Domestic Boiler in the UK', and is designed to provide a fair comparison of the energy performance of different boilers.
What difference can an energy efficient boiler make?
- It produces less CO2
- It will consume less fuel
- It can therefore significantly reduce gas heating costs
How is a SEDBUK rating calculated?
SEDBUK 2009 refers to the average annual efficiency achieved in typical domestic conditions, and the rating is calculated using:
- The pattern of usage and typical domestic usage patterns
- The UK climate
- Boiler type
- Ignition
- Fuel used
- Internal store size
From October 2009 there are two SEDBUK rating systems SEDBUK 2005 and now SEDBUK 2009. The scale used in SEDBUK 2005 rated boilers using a scale from A-G. SEDBUK 2009 no longer utilises this scale and is designed to produce a more realistic 'as installed' estimate of the average annual efficiency of a boiler.
The Building Regulations Part L requires all boiler installations to have minimum efficiency levels of 90% for SEDBUK 2005 and 88% for SEDBUK 2009. This 2% variation relates to the difference between winter and summer boiler operation.
The A-G banding will still apply to all boilers tested under SEDBUK 2005 and manufacturers will need to make it clear as to which rating system is used for the efficiency figures used.
High efficiency range
All Baxi SEDBUK Band A rated boilers are recommended by The Energy Saving Trust.
