UL-268A › Complete Document History
Standard for Smoke Detectors for Duct Application
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4TH EDITION - SMOKE DETECTORS FOR DUCT APPLICATION - Dec. 11, 2008
CHANGE 09/09 - REVISION CHANGE - CODE B - Sept. 25, 2009
CHANGE 10/14 - REVISION CHANGE - CODE B - Oct. 2, 2014
CHANGE 08/16 - REVISION CHANGE - CODE B - Aug. 12, 2016
CHANGE 08/20 - REVISION CHANGE - CODE B - Aug. 20, 2020
CHANGE 08/23 - REVISION CHANGE - CODE B - Aug. 25, 2023
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Obsolete Revision Information: |
CHANGE 04/06 - REVISION CHANGE - CODE B - April 21, 2006
CHANGE 04/03 - REVISION CHANGE - CODE B - April 10, 2003
CHANGE 09/01 - REVISION CHANGE - CODE B - Sept. 5, 2001
3RD EDITION - SMOKE DETECTORS FOR DUCT APPLI - May 15, 1998
1983 EDITION - SMOKE DETECTORS FOR DUCT APPLI - Jan. 1, 1983
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