My split has a drain off the unit inside the house. I have it draining to a Beckett pump/reservoir that collects the water and when it reaches a certain level, pumps it via clear vinyl tubing up and along the ceiling to the back room drain. This is a nice feature that I will not need in the future because I will just have it drain passively to my tubsink.
It is wired directly to it's own circuit and is operated by a remote control...it doesn't plug in directly like a window AC unit.
It is whisper quiet and can cool my whole basement if I want it to, but I just wanted it mainly for how much heat all of the equipment would generate and how much evaporation it would have to handle. Basically, I calculated all the wattage of pumps, heaters, lights, etc, along with the room size, water volume and approximated evaporation rate, gave it to an engineer and went with the 12,600 BTU unit.
Then I bought the split and had our HVAC guy put it in place.
Dave