CSA/AM - ANSI Z83.4-1989
DIRECT GAS-FIRED MAKE-UP AIR HEATERS FOURTH EDITION; ADDENDA Z83.4A - 1989, ADDENDA Z83.4B - 1990
|Publication Date:||1 January 1989|
The standards set forth herein apply to the fourth edition of the Standard for Direct Gas-Fired Make-Up Air Heaters, ANSI Z83.4-1989, and Addenda thereto, Z83.4a-1989, and supersede corresponding standards therein. Following their preparation by the supervising subcommittee, they were accepted by Accredited Standards Committee Z83 and subsequently approved as American National Standard by the American National Standards Institute, Inc.
NOTE: Changes, other than editorial, are denoted by a vertical line in the margin.