When it comes to selecting a portable air conditioner unit the first thing you need to think about is the size of the room you want to cool. If you buy a unit that is underpowered for your room then you will end up with a unit that won't have the air flow and cooling power to fully cool the room. However, if you choose a unit that is too powerful you might find that you are using too much electricity and wasting money on running costs. So it's really important to get it right. To help you ensure you get the perfectportable air conditioning unit for your needs I've created a simple 3-step process.