If the recirc fans were off,or non existent,the bleed demand would be higher since all air source to the mix manifold would come from the packs alone.
Nonsense... That is the myth I mentioned. It is exactly like I wrote in my previous post. Look in your mel for recirculation fans, and show me the extra fuel you need to carry (none, as there is no higher demand on the pack).
I do fly NG. The pack are fixed and always deliver the same output, no matter what the condition of the cabin is (recalculations fans on or off). Those flows are either normal flow or high flow.