

The grates allow cool air to be forced up in front of racks. Unless your company cheaped out on datacenter construction, picked a room too small, didn’t leave room for the ramp to get up to proper height without breaking code on the incline, and had to rig a half-height raised floor that barely left room for electric, let alone proper air flow, so there had to be a huge air handler on top of the unit to blow cold air in the wrong places. And then bought a generator that wasn’t beefy enough to cover the AC, so every time the power went out it’s a mad scramble to put rolling units in place to keep the room at ~90F.
And all of the brass thought themselves geniuses for saving a few dollars.
And, importantly, have convinced themselves that anyone arguing against them is doing the exact same thing. Classic projection.