Wayne Boatwright wrote:

Bobby, the truly simplest approach is to relocate the unit outside the
living space. My parents had central vacuums in their homes since the
first ones were introduced. There were three scenarios of their
installations. (1) Garage, (2) Basement, (3) Spare Closet, where the
interior walls of the closet were heavily insulated. Another possibility
would be the attic.

In an attic installation, how much performance is lost with an uphill
pipe run?