placement of air conditioners! hey guys..actually i was doing my homework and i had this question,"why the air conditioners should be installed above the level of the windows". i REALLY need help guys!! :/

It is generally easier, and more practical, to install the air conditioner underneath or above an existing window, at least from an architectural standpoint. However, you do not want the unit to be too high, and this may be the case if considering installing it above a window. Because heat rises, it is also ineffective to have the air conditioner at a high level, as you will not feel the cool air from the unit if it is up high

hot air rises, cool air sinks!