Both volumes include fundamentally the same guidance with regards to fire doors, although some of the specifics with regards to classification period and self-closing devices does vary depending on the location and application. Appendix A deals with fire performance of materials. Table A4, specifically for doors on escape routes, limits the area of glazing within the door where relevant performance can only be achieved in terms of integrity. Where both integrity and insulation performance can be met, there is no restriction on the amount of glass. Appendix B sets out specific requirements for fire doors. In particular, fire resistance is defined in terms of testing to BS 476: Part 22 or EN 1634-1 (classified in accordance with EN 13501-2). The new draft Part B stresses that test evidence must adequately demonstrate compliance of the complete installed assembly, which is more straight forward with doorsets. Table B1 of Part B links various door locations with minimum fire resistance, generally FD20 or 30 (or E20 or E30 if tested to EN 1634-1). Traditionally, an FD20 doorset has been assumed to be an FD30 without intumescent seals. Where FD20 doorsets are specified, CERTIFIRE approved manufacturers will supply FD30 doorsets with instructions to fit seals if they have not already been fitted, as no specific evidence is available to support doorsets without seals. The suffix ‘S’ indicates a requirement for restricted ambient smoke leakage when tested in accordance with BS 476: Section 31.1 (or ‘Sa’ when tested to EN 1634-3). In addition: Volume 2 requires all fire doors to have self-closers (except cupboards and service ducts, normally locked shut). However, Volume 1 only requires self-closing devices to be fitted to fire doors serving an attached or integral garage in dwelling houses.