Question

In a room it is best pace a room heater on the floor but an air conditioner near celling ? Why?

Answer 1

In a room it is best to place a room heater on the floor but an AC near the ceiling because heater produces hot air which rises up making the air in the room warm.

Whereas AC is usually used in summer to keep the air cool and is placed near the ceiling so that the cold air spreads in the room making it cool.