By Mary H.J. Farrell Size matters when you’re buying a window air conditioner. An air conditioner that’s too small will ...

The reason being is that they are slightly less efficient than window units.” So when buying a portable air conditioner, size up — and ... included some of the smallest portable air ...

Our portable air conditioners versus window air conditioners guide ... you need a unit that isn't too big or too small for your room size. If you get a unit that is too big for your room, it ...