BS-6644 › Complete Document History
Specification for the installation and maintenance of gas-fired hot water boilers of rated inputs between 70 kW (net) and 1.8 MW (net) (2nd and 3rd family gases)

Complete Current Edition:
   2011 EDITION - rated inputs between 70 kW (net) and 1.8 MW (net) (2nd and 3 - Nov. 30, 2011
   2011 EDITION CORRIGENDUM 1 - CORRIGENDUM 1 FOR 2011 EDITION - Jan. 1, 2013

Obsolete Revision Information:
   2005 EDITION AMENDMENT 1 - AMENDMENT 1 FOR 2005 EDITION - Nov. 1, 2008
   2005 EDITION - 70 KW (NET) and 1.8 MW (NET) (2ND and 3RD FAMILY GASES) - July 8, 2005
   AMD 7640 - AMENDMENT 1 - June 1, 1993
   1991 EDITION - SPECIFICATION FOR INSTALLATION - Jan. 1, 1991