reply to Dodge
Re: Tray for portable A/C Typically, these washing machine/water heater pans have a means of piping the collected water to a drain somewhere nearby, either via a direct pipe or a small pump. You may not have such a drain in your computer room. Just get one of the condensate pumps and a short flexible hose into a 5-gallon bucket. Check the bucket periodically and empty it if needed (which from your description, probably won't happen, but this is just to be sure).