All kinds of external pedestrian doors – solid doors, partially glazed doors and fully glazed doors – are included in the scheme. The simulations for the BFRC DER Scheme allow every style to be included whether they are constructed of PVC-U, aluminium, timber or are a composite type door. They are rated ‘A’ to ‘G’.

Solar gain is not included in the rating process for external pedestrian doors, however, air leakage rates are taken into account. An ‘E’ rating is indicative of a U value of 1.8 as allowed for in the current Part L buildings regulations. An ‘A’ rating will reflect the standard of the best performing doors currently available.

Table – BFRC DER band cut-offs using door energy index numbers

Exclusions
Doors rated ‘F’ & ‘G’ will not satisfy buildings regulations but have been included to cover product that is exempt such as those for listed buildings or other architecturally sensitive applications.