The boiler ERP (Energy Related Products) directive is designed to provide consumers with clear and transparent information on the energy efficiency of their purchasing products and how this may impact their energy bills. For example, appliances are given energy efficiency ratings, ranging from G to A (A+++ for certain types of appliances), with higher alphabetical ratings indicating higher levels of energy efficiency. Previously, SEDBUK (Seasonal Efficiency of Domestic Boilers) ratings were used to assess the energy efficiency of boilers.
However, the ErP directive has primarily replaced this for modern appliances. However, some manufacturers still use SEDBUK ratings and a similar alphabetical classification system.