scope:

PREFACE

The standards set forth herein apply to the first edition of the Standard for Performance Testing and Rating of Gas-Fired, Air-Conditioning and Heat Pump Appliances, ANSI Z21.40.4-1996 • CGA 2.94-M96, and supersede Corresponding standards therein. Following their preparation by the supervising subcommittee, they were accepted by ANSI, and the Interprovincial Gas Advisory Council, and Subsequently approved.

NOTE: Changes, other than editorial, are denoted by a vertical line in the margin.

On June 30, 1997, the Canadian Standards Association (CSA) acquired International Approval Services (IAS) which was until then a joint venture of the American Gas Association (A.G.A) and the Canadian Gas Association (CGA). Under this agreement CSA acquired the complete renge of IAS standards administration, certification and registration products and services for appliances and accessories fueled by natural and liquefied petroleum gases.