Are shelves, PDUs, roof fans and cable-entry brushes supplied with the cabinet or purchased separately?

They’re purchased separately.

The cabinet includes its normal door, panels, mounting profiles, cable-entry covers, bonding provision and starter rack-fixing pack. Shelves, PDUs, roof fans and brush inserts are optional accessories chosen according to the installation.

Supplying every conceivable accessory with every cabinet would be a wonderfully efficient way of making customers pay for a small collection of parts they didn’t need.

A patch-panel-only installation may need no shelf or fan at all, while another cabinet may need several accessories. Choose them around the equipment and layout you’re actually building.