Straight out of the box and installed in about 10 minutes. It's a dual hose design, but there's a big "but" here. But, the condenser air intake also has side vents in the plastic. This means it will also draw air from inside the room just like the single hose design air conditioners, and create somewhat of a negative air flow in the room, even if both hoses are installed in the window. It behooves me as to why they would do this. Not many people would catch on to this, but for me I just taped up the extra vents and force the intake to come entirely from the hose, problem solved. I suppose in an air tight room this wouldn't be a problem, but not many rooms are air tight. Otherwise it blows very cold air and lots of it. For what I bought it for it does the job.
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