AS 4566 pdf download – Flue cowls—Gas appliances 2.1GENERAL A flue cowl shall be made of non-combustible corrosion resistant material. Metals shall notbe used in combinations such as to cause detrimental galvanic action,which will adverselyaffect any part of the assembly. 2.2 DESIGN 2.2.1 Attachment without alteration Flue cowls shall be designed for ready attachment to the flue terminal without requiringalteration,...