scope:

PREFACE

This publication represents a basic standard for safe operation, substantial and durable construction, and acceptable performance of gas-fired illuminating appliances. It is the result of years of experience of many men and many organizations in the manufacture, testing, installation, maintenance, inspection and research on alliances designed for the utilization of gas, performance and substantial and durable construction of such gas-fired illuminating appliances.

Nothing in this standard is to be considered in any way as indicating a measure of quality beyond compliance with the provisions it contains. It is designed to allow compliance of illuminating appliances, the construction and performance of which may exceed the various provisions specified herein. In its preparation, full recognition has been given to possibilities of improvements through ingenuity of design. As progress takes place, revisions, may become necessary. When they are believed desirable, recommendations should be forwarded to the Chairman of the American National Standards Committee Z21, 58501 East Pleasant Valley Road, Cleveland, Ohio 44131.

Safe and satisfactory operation of a gas-fired illuminating appliance depends to a great extent upon its proper installation and it should be installed in accordance with American National Standard Installation of Gas Appliances and Gas Piping, Z21.30-1964 Manufacturers' installation instructions, and local municipal building codes.

Users of this American National Standard are advised that the devicedproductdactivities within its scope may be subject to regulation at the Federal, state or local leveL Users are strongly urged to investigate this possibility through appropriate channels. In the event of a conilict with this standard, the Federal, state or local regulation should be foliowed.