ANSI Z21.47-2012/CSA 2.3-2012

Preface

This publication represents a basic standard for safe operation, substantial and durable construction, and acceptable performance of gas-fired central furnaces. It is the result of years of experience in the manufacture, testing, installation, maintenance, inspection and research on gas-fired central furnaces designed for utilization of gas. There are risks of injury to persons inherent in appliances that, if completely eliminated, would defeat the utility of the appliance. The provisions in this standard are intended to help reduce such risks while retaining the normal operation of the appliance.


Scope

Details test and examination criteria for automatically operating gas-fired central furnaces for use with nat., mfd. and mixed gases, LP gases and LP gas air mixtures. Central furnaces are designed to supply heated air through ducts to building spaces remote from or adjacent to the appliance location. Central furnaces are intended for installation in residential, commercial and industrial structures including Direct Vent, Recreational Vehicle, Outdoor and Manufactured (Mobile) Home.