UL-2561 Complete Document History
Standard for 1400 Degree Fahrenheit Factory-Built Chimneys

Complete Current Edition:
   2ND EDITION - Standard for 1400 Degree Fahrenheit Factory-Built Chimneys - Jan. 22, 2016
   CHANGE 04/18 - REVISION CHANGE - CODE B - April 19, 2018
   CHANGE 10/20 - REVISION CHANGE - CODE B - Oct. 20, 2022

Obsolete Revision Information:
   CHANGE 05/13 - REVISION CHANGE - CODE B - May 29, 2013
   1ST EDITION - 1400 DEGREE FAHRENHEIT FACTORY-BUILT CHIMNEYS - July 31, 2009