Question

why are heaters fitted near the floor and air conditioner near the ceiling of a room???​

Answer 1

$\huge \underline \bold{Answer}$

As you know hot air Rises up and cold air settles down so room heater is placed near to the floor so that the heat can move uniformly from down to up. similarly, the air conditioner is placed near silly so that it can cool both the upside of the room and the cold air can go downside so that there is uniform cooling

Answer 2

Room heaters are fitted near the floor because this this allows the hot air near the heater to rise up and warm the entire room.

The air conditioner fitted near the ceiling, so that the cold from the AC take the place of the hot air rising up from the bottom. In this way, the entire room gets cooled.