Got the blower side of the vent system made this morning.
2 of these boxes will be on top of and outside the bookcase and will blower air into the canopy. I wanted to make sure I did not have a bunch of light shooting up through these holes and ruining the look so I made these baffled boxes.
Was a little worried the baffling would restrict air flow too much, but the air coming out is strong enough to blow out a lighter for 12" away, so I think it should be good. I used Silnex 120mm fans and they are absolutely dead silent. Can not hear them at all sitting right next to it.
This is how they will sit on top of the canopy, blowing air down into it.
This is the internal baffling
2 of these boxes will be on top of and outside the bookcase and will blower air into the canopy. I wanted to make sure I did not have a bunch of light shooting up through these holes and ruining the look so I made these baffled boxes.
Was a little worried the baffling would restrict air flow too much, but the air coming out is strong enough to blow out a lighter for 12" away, so I think it should be good. I used Silnex 120mm fans and they are absolutely dead silent. Can not hear them at all sitting right next to it.
This is how they will sit on top of the canopy, blowing air down into it.
This is the internal baffling
Looks like you could drive a truck over it, lol. I'm guessing that was a case of using what you already had on hand? is that 1/2" ply?
because you can. 
