I give the 4 star rating instead of 5 stars as I was hoping this unit had a air flow control to switch from "outside" air intake to recycling "inside" air drawn from inside my home. When advertising/listing your air conditioner units online on ANY website, AND on the box you print for when a unit is sent out to sit "on the shelf" in a retail setting at a brick and mortar store, you should always make mention of a controllable air intake feature to help a customer decide as to which of your air conditioners are appropriate for the customers needs