We have multiple projects with data center with ceiling tiles, here are some comments:
1) The finish floor to ceiling height ratio needs to be taken into account, as you are correct you will severely limit your infrastructure placement.
2) The ceiling tile creates a air return plenum, just as the below the raised floor you create the air supply plenum.
3) Keep in mind the type of tile, some get damage pretty easy and release particles in the air stream.
4) By having raised floor perfs and ceiling grid return air grilles you can better distribute or control your supply and retrun air flows.
5) Ceiling Tile management is required as with raised floor tiles.
6) Cleanliness is critical.
7) I would not use fire gas suppression system in projects with ceiling tile, however I have seen a reduction on thsi approach due to cost.
Our current Datacenter has tile ceilings but it is a nightmare…we can’t get our gas suppression pressure tested because the tiles leak. We have retainer clips on them but atleast one or more tiles always pop loose or the corners crack.
Besides I don’t think you have tall enough ceilings to use tiles anyway. We are currently building a new datacenter and our engineers did some research and the minimum ceiling height is 14 feet. If you put in tiles you are lowering that and you won’t be able to get the heat far enough away from the racks.
Good Point. We have ceiling tile in our DC and we had to install an exhaust to pump the hot air out of the space above the tile canopy. If I could do it all over again I’d nix the tile and go with open ceiling about 20-25 ft with a raised floor.