Gosh, I wonder where you guys live.. The AC unit pulls the humidity down as it cools (actually it _has_ to remove the moisture first). Which means that _all_ t

Gosh, I wonder where you guys live.. The AC unit pulls the humidity down as it cools (actually it _has_ to remove the moisture first). Which means that _all_ the excess humidity/condensate goes down the AC drain from the evaporator which will be 20-40F (more or less, depending on system/etc, it might be more) cooler than the inlet. If you live say in the southern US and have ever had to use aux cooling in a datacenter you will be shocked at how much you have to empty the condensate collectors. Even on fairly small units you can fill up 55 gallon trash cans in a couple hours. AKA even if its way overspeced you won't get a relative humidity > 100% which is what is required for everything in the room to start condensing. So, if the outlet is really cold, and the humidity/room temp is high you can actually get a small amount of visible condensation as the cold air blows into a hot humid room, but I've never see that stuff manage to get more than a foot or two before it turns back into vapor. Basically a tiny cloud. Which would be how you _might_ get some condensate on something.. If your blowing the cold air against something (or its discharging up through a raised floor vent into a machine cabinet) and the humidity is high in the room it might be possible, but this is why you either mix the room/ac air first, or you seal the cold isle/machine cabinet/floor to avoid cold->hot leaks. If the AC is flowing from the cool/dry side through the machine the machine even if its not heating the air much will just raise the temp, not the humidity. Which lowers the RH in the room. Also, the condensate on a machine room window, will be on the _outside_ where its warmer/wetter because the window is _cooler_ than the outside ambient. Also, unless there is a huge air leak in the room, the machines will act like a heater, and the room will tend to have a fairly low relative humidity. AKA the AC will pull out the moisture for a given temp, and the machines/walls raise the temp of that air, so you have air with low relative humidity. So, the only way the room starts to condense is if a bunch of external warm+humid air is added to a room, but that can happen independent of how much over/under cooling is happening. Running a perfectly setup room at say 70F, and throwing a the doors open to 100F 95% RH air and replacing the air faster than everything in the room can warm up will condense.