I bought this because my girlfriend's AC in her house does not work effectively and I thought, well maybe we can put this in the bedroom as a temporary fix for the summer. I live in Houston where it is both humid and in the 90s at night. That stated this unit is not suppose to work. When we run it in the room at medium we usually end up waking up underneath the winter comforter. The fan is quiet and the effective... the only drawbacks are the annoying lights and the design of the button console, bc the buttons are not exactly intuitive... but we consider this a minor drawback.
I don't thik this unit would work if there was no AC in the house, but since the compromised AC does dehumidify the air slightly and lower the temperature a bit, this unit is able to make a remarkable improvement in the air quality. I am very happy with the product.