I tested the cooling capacity of the window-air-conditioner and found it performed better than my expectations. It cooled my office to a comfortable temperature of 68-69 degrees even when it was 90 degrees outside.
This air conditioner has a much better cooling capacity than two separate units totaling 14,000 BTU.
I found the installation of the unit to be very easy with no additional support or hardware required. The instructions were basic, but I had no problem installing it due to my DIY experience.