2018UL 641 BULLETIN-2018 UL Standard for Safety Type L Low-Temperature Venting Systems (COMMENTS DUE: March 26@ 2018)
1970UL 641-2018 Low-temperature venting systems, type L
2013UL 641 BULLETIN-2013 UL Standard for Safety Type L Low-Temperature Venting Systems (COMMENTS DUE: MAY 27@ 2013)
2010UL 641-2010 UL Standard for Safety Type L Low-Temperature Venting Systems (Eighth Edition; Reprint with Revisions Through and Including April 23@ 2018)
2009UL 641 BULLETIN-2009 UL Standard for Safety Type L Low-Temperature Venting Systems (COMMENTS DUE: MAY 24@ 2009)
2007UL 641 BULLETIN-2007 UL Standard for Safety Type L Low-Temperature Venting Systems
2005UL 641 BULLETIN-2005 UL Standard for Safety Type L Low-Temperature Venting Systems
1995UL 641-1995 UL Standard for Safety Type L Low-Temperature Venting Systems (Seventh Edition; Reprint with Revisions Through and Including August 12@ 2005)
1994UL 641-1994 Low-temperature venting systems, type L