Many people do not know how to set up a window air conditioner and therefore just allow their homes or offices to remain sweltering during the summer. Window air conditioners are great because they are the least invasive air conditioning systems to install and can very easily be turned off or removed as is needed. They are easy to put in and should come with descriptive directions and charts.
However, not all directions give little tips and tricks. The first thing you should do is make sure to install it during the day. Daylight will make it easier to see what you are doing so it does not fall out of the window, and it will also keep bugs from entering while the window is open. Have everything ready and laid out before you have unpacked. Have the screen removed from the window.
Remember that these only work for windows that can be pulled up. Ones that crank out will not open wide enough, nor will they have anything to hold the air conditioner steady. Open up the window as wide as it can go to give yourself a little extra room to work. It is helpful if you have someone there to push down the top sash when the time comes.
Make sure the air conditioner is facing the right way. The front, which should be inside the room, should have the dials and the cord to plug into the wall. The back, the part that hangs outside, should have the vents where water will drip out. Carefully place it on the window sill, facing the right way. There should be ridges around the perimeter of the air conditioner to show you where it should line up with the window.
Once you have this lined up, slide open the side panels. These are designed to fill up the rest of the window that the device does not fill. Slide them as tightly over as you can. Have the top sash of the window lowered carefully and slowly down until it comes into firm contact with the top of the conditioner. The frame should be very tight against it to brace it and keep it from falling. Slowly lessen your grip on it. If the conditioner wobbles, the sash is not down tightly enough. After it is secured, put in the foam provided around all cracks. You may have to use extra strips of paper towel to really make it tight. This will keep bugs from entering. Plug it in and turn it on.