The links in the illustrations are for ducting kits which are listed in the component pages.
Sketches are not to scale and show the kits used in most situations.

100 mm (4") nominal
dk 4/1	dk 4/2
	dk 4/3 1M long dk 4/4 2M long dk 4/5 3M long
dk 4/6 1M long dk 4/7 2M long dk 4/8 3M long
dk 4/9     Return air box dk 5/11

125 mm (5") nominal
dk 5/1	dk 5/2 1M long dk 5/3 2M long dk 5/4 3M long	dk 5/8
150 mm (6") nominal
dk 6/1 1M long dk 6/2 2M long dk 6/3 3M long	dk 6/7 3M long