1 Scope 1.1 This Standard applies to all types of laboratory fume hoods, except for recirculating fume hoods. 1.2 This Standard specifies (a) safety requirements for fume hoods;
(b) test methods for assessing fume hood performance;
(c) requirements for the selection, use, and maintenance of fume hoods;
(d) requirements for the education of fume hood users and maintenance personnel; and
(e) requirements on information to be exchanged between suppliers and users of fume hoods to ensure that installation, function, and maintenance are compatible with the intended use. 1.3 This Standard does not address detailed design considerations such as fan selection and duct and stack velocities. This Standard does not apply to biological containment cabinets.
Note: Requirements applicable to the installation and field testing of biological containment cabinets are found in NSF/ANSI 49. 1.4 Users of this Standard should note that fume hood requirements are also established by regulatory authorities.
Note: Other fume hood requirements can be found in, e.g., the National Building Code of Canada, the National Fire Code of Canada, the Canadian Environmental Protection Act, and the Nuclear Safety and Control Act. 1.5 In CSA Standards, "shall" is used to express a requirement, i.e., a provision that the user is obliged to satisfy in order to comply with the standard; "should" is used to express a recommendation or that which is advised but not required; and "may" is used to express an option or that which is permissible within the limits of the standard. Notes accompanying clauses do not include requirements or alternative requirements; the purpose of a note accompanying a clause is to separate from the text explanatory or informative material. Notes to tables and figures are considered part of the table or figure and may be written as requirements. Legends to equations and figures are considered requirements. 1.6 The values given in SI (metric) units are the standard. The values given in parentheses are for information only.