Convection in the room
There are three ways to transfer the heat: conduction, convection, and radiation.
Convection is the method by which heat is transferred by the direct movement of particles that make up a liquid or gaseous substance.
Convection phenomena are frequently observed in our daily lives. If only the bottom of a pot of water is heated, the entire pot of water will boil due to convection. When the sun rapidly heats the Earth’s surface, the air rises, and rain clouds are formed. The candle flame pointing upward is also a phenomenon due to convection.
The convection phenomenon is also closely related to air conditioners and heaters.
Air conditioners are usually installed in high places. The cold air coming out of the air conditioner has a high density, so it sinks, and the warm air inside the room rises. This effectively lowers the room temperature.
If the air conditioner is installed in a low location, the cold air accumulates at the bottom, preventing air circulation and reducing the cooling effect.
Unlike air conditioners, heaters are typically installed in a low location. The air heated by the heater rises because it has a lower density, and the cold air goes down. This way, the room is evenly heated.