If we are being honest for a second, there is one really big issue that outdoor projectors, or other projectors for that matter, have. They need a minimum amount of distance from the screen to their lens, again known as the throwing distance, to provide you with an ideal screen size. Say you only have a certain amount of room and you notice the screen size is not as large as advertised, you will be left in a bit of a tough spot. Honestly, you may just have to move the projector in a different location to achieve the manufacturer’s recommended throwing distance.
Of course, if you have no other choice, you can also invest in a short throw projector which is designed to fill your screen at a short distance. Depending on the room that you have to work with, this is one of the main reasons you need to pay attention to the throwing distance.