To ask the Secretary of State for Energy and Climate Change what the efficiency ratings are in respect of the Standard Assessment Procedure for the calculation of carbon emissions of domestic boilers using B30K oil. (322830)

The Oil Firing Technical Association (OFTEC) commissioned efficiency trials which compared C2 kerosene, BS 2869 and B30K in the same boiler and the results are indicated in the following table. While this is a small sample, the results suggest there may be a marginal difference in efficiency from using B30K compared with kerosene alone.

Nonetheless, manufacturers of those boilers that have been modified to burn B30K have yet to submit information on boiler efficiency for inclusion in the Boiler Efficiency Database. This database is the repository of boiler efficiency information that underpins the Standard Assessment Procedure (SAP) and can be accessed at:

www.sedbuk.com