The Frigidaire 15,000 BTU window mounted AC unit is reasonably quiet and cools our whole 1470 square foot house. Overall I am very pleased with my purchase. Before I purchased this unit I wasn't sure I could get it installed into my aluminum replacement window but I was able to do it. I tried to closely follow the installation instructions but had to deviate and come up with my own plan steps because the instructions are written for a wooden sash window. When the AC cabinet was fit into my window it fit tight and had no slope for water drainage. I added a 1/2" stool step and mounted the cabinet on it. I adjusted the step and window sash  alignment with the cabinet for a downward slope for drainage. I used an additional universal support bracket to support the weight of this 100 pound unit. [This review was collected as part of a promotion.]