Addenda to American National Standard Z21.12-1990 for Draft Hoods. Approved April 23, 1993 by American National Standards Institute, Inc. NOTE: Changes, other than editorial, are denoted by a vertical line in the margin.
1.1 Scope 1.1.1 This standard applies to newly produced illuminating appliances constructed entirely of new, unused parts and materials: (a) For use with natural gas; (b) For use with manufactured gas; (c) For use with mixed gas; (d) For use with
1.1 Scope 1.1.1 This standard applies to the construction and installation procedures for newly produced automatic intermittent pilot ignition systems (see Part II, Definitions), hereinafter referred to as "systems", constructed entirely of new, unus