We have 2 - a split-system model (has a compressor unit that sits outside) and another which has a fat tube that vents out a window. Both Pinguinos, both very effective, do well in a large room. The problem you will have with being a unit is that you will need to think about how to keep your windows locked in the open position (where the vent is) so there are no safety issues with kiddies falling out windows. I suggest you go and have a look at some models, you will get an idea of what the vents look like and you will be able to plan what you want.