I bought this Frigidaire window mounted unit right before the start of summer 4-6 weeks ago. This unit replaced my old 5200 BTU unit which was larger in overall size, and I did not think the difference would be very noticeable. However, this unit efficiently and quickly cools down my 14’x10’ bedroom and I noticed an immediate increase in power despite the smaller size. It is light weight and was easy to install into my windows despite their old age and abnormal frame. [This review was collected as part of a promotion.]