Common Venting Systems for Category III or IV Gas Appliances
16 October 2012
Reference #: D-G5 091103 4 Rev 01
Clause 8.10.6 has been revised in the B149.1 2015 (effective November 01) edition to add conditions and requirements for the common venting of appliances operating with a positive pressure.
This revision has made Directive No: D-G5 091103 4 redundant.