I was so excited to order this product. I mean I have nothing but respect for MIT. I'm renting a room and I have absolutely no money. I'm a teacher and teachers make nothing. My little portable air conditioner came pretty quickly. I was very excited. I followed the directions is the coldest water I could I charged my unit I put it in cold water. In the coldest I could get it turned it on nothing absolutely nothing I didn't drop the temperature in my room for 1°. Doors closed windows closed almost suffocated, I'm gonna return it tomorrow and see how that goes right another review after that process please don't waste your money or your time