Originally Posted by
Hopper
Does anyone have any experience or knowledge, maybe a bit of science, when it comes to fans, what amount of air they move and how the duct sizes and / or reducing them affects how they move air and noise levels
For example, you can get a box fan that moves 3250m3/hr of air, in various duct size connections like 8" and 10", however, again for example, if I have the 10" collar/hole on my box, what would matter or change if I reduced the ducting to say 8" or even 6" of if it? Surely not less air flow? Maybe more noise?
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