This is the first edition of the Technical Guidance Manual produced for the purposes of the Electricity and Gas (Energy Efficiency Obligations) Order 2004 (the Order). Specifically, the role of the manual is to provide information on:

• the factors taken into account in quantifying the improvement in energy efficiency to be attributed to the installation or provision of a type of action (eg, loft or cavity wall insulation, a low energy light bulb), and
• best practice guidelines which Ofgem encourages suppliers to comply with in relation to each action.