This Part of BS 2646 gives guidance on the planning for, and installation in laboratories of, autoclaves for the sterilization of material and equipment, including those which may be contaminated with organisms categorized as Hazard Groups 1, 2, or 3¹⁾. It does not cover the installation of autoclaves used for material contaminated with organisms categorized as Hazard Group 4, for which complete containment of condensate is considered to be essential.