On Tue, 04 Apr 2017 22:00:37 -0400, Dan Espen opined:

Ideally, they will directly relate.

That's what I was kind of thinking, which was that the amperage should
mostly relate to the suction and aifflow, most other things being roughtly
equal (like hose diameter).

Fortunately, my whole house system still works and I hope to
never go back to those stand alone vacs. They just don't suck
enough.

Mine doesn't work any more.
It hasn't worked for two years.
https://groups.google.com/d/msg/alt....w/C-a-6iiVHrMJ

Sometimes you need to call a repair man.

Anathema!