I've installed industrial units (erbo) using Jacob flanged pipe and never had an issue... probably overkill for a house but they pretty much bomb proof and other than replacing the dust bags are maintenance free. I'd guess the main advantage is that it can all be a bit more heavy duty as weight is not an issue and thus won't wear out.
Whole house vacuum systems
Isn't there some fluid transfer law that links the length of a tube and the power required to generate a specific flow at various points along that tube generally involves factors of ^2?
You mean the Hagen-Poiseuille equations, so beloved of my postgrad examiners?
Flow is proportional to the pressure drop along a tube, and 1/length, so if the maximum negative pressure generated is the same for a portable hoover and a central one, the suction flow will be much lower for the central one due to the much longer tubing length.
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