My hubby decided to take on the replacement of a window a/c, although he had no experience whatsoever in doing such a procedure. He assured me that he had read enough on the internet to figure out how to do it. I made the decision to give him our full support, however I had our doubts. I did a bit of research myself and realized how much is honestly involved. For example, when using support brackets to hold the a/c in site, the window sill should first be checked for rotting wood or other material. Otherwise, the a/c could fall right out. Also, no matter how strong the replacement person, it is essential that another person help lift and hold the unit in site since window a/cs are extremely heavy. One thing that I read made me chuckle, since it stated that the window and the a/c should both be measured before making any purchases. I am quite confident that our hubby would suppose that! Then there are sealing materials needed to prevent hot air (and bugs) from entering the room. Modern a/cs come equipped with extensions to occupy the part between the unit and the window sash, but by filling the cracks with foam (or other Heating, Ventilation, and A/C material), the a/c will operate much more efficiently…and you won’t have bugs coming in! One last thing that I read made perfect sense, that the installed window a/c should be situated within 6feet of an electrical outlet. The article explained that most modern a/cs come with a 6foot long electric cord, but that adding an extension cord was unsafe. Thankfully, our hubby and his sibling ended up doing a fantastic task.