Yes, this type of range hood is custom-made, usually by the kitchen builder / cabinet maker. The outside can be painted or stained to match the rest of the cabinets - or, as in this example, to contrast the cabinets & match the floor / furniture.

Inside, the hood is powered by an "insert" (sometimes also called a "power pack") - a fully functional range hood, minus the outer shell, designed to go into a custom cabinet or stone/metal/plaster hood enclosure.

Here's a gallery of hood inserts, along with more ideas for cabinet designs:

http://www.futurofuturo.com/rangehood-FAQ-custom-range-hoods-and-inserts.php