This particular unit is an industrial one and the engine and remote blower are on the outside. See their website here: http://www.modernaire.com/modernaire/PS-16_files/PS1630%20Cut%20Sheet%20PDF.pdf We hope this helps.

So, this hood would not work if you have a room above the kitchen? Is that correct?

Also, how much room do you need between the ceiling and the next floor if it can go below another room?

Thank you for your inquiry. I believe you should discuss this with your contractor or the manufacturer. This particular install did not have a room above.