Why are heaters fitted near the floor and air conditioners ceiling of a room?

Heaters are typically fitted near the floor of a room because warm air rises. By placing the heater near the floor, the warm air it produces can circulate more effectively throughout the room. This ensures that the entire room is evenly heated, and that people in the room are not exposed to uncomfortable cold drafts.

Air conditioners are typically fitted near the ceiling of a room because cool air sinks. By placing the air conditioner near the ceiling, the cool air it produces can circulate more effectively throughout the room. This ensures that the entire room is evenly cooled, and that people in the room are not exposed to uncomfortable warm air.