British Standard 5295 was a set of standards for the cleanroom industry layed out by the British Standards Institution. Sections of the standard have been superceded by the ISO 14644. There are five sections to the standard.
Part 0: Definitions and Tems
Part 1: Cleanroom and Device specifications
Part 2: Construction & Design specifications
Part 3: Operational & Discipline procedures
Part 4: Monitering & Compliance specifications