Radiator heaters, also known as radiant heaters, are space heaters that use natural convection to heat spaces. This is the transfer of thermal energy from a hot surface to the cooler air around it.

Radiator heaters, also known as radiant heaters, are space heaters that use natural convection to heat spaces. This is the transfer of thermal energy from a hot surface to the cooler air around it.

The image above, provided by NASA, highlights how all three heat-transfer methods (conduction, convection, and radiation) work in the same environment. What is Conduction?

The expert explains: "That's because radiators work on the principle that hot air rises by natural convection. Cold air is drawn up the radiator at the bottom and rises out warm at the top." ...

[4] Numerical evaluation of indoor thermal comfort and energy saving by operating the heating panel radiator at different flow strategies. Energy and Buildings (2016).

Zhelyazkoexplains: "That's because radiators work on the principle that hot air rises by natural convection. Cold air is drawn up the radiator at the bottom and rises out warm at the top." ...

Yanchev advises that since radiators rely on the principle of natural convection where hot air rises, any objects placed on or under them can disrupt this process.

Yanchev explains: “That's because radiators work on the principle that hot air rises by natural convection. Cold air is drawn up the radiator at the bottom and rises out warm at the top.” ...

They explained: "That's because radiators work on the principle that hot air rises by natural convection. Cold air is drawn up the radiator at the bottom and rises out warm at the top." ...

He explained: “That’s because radiators work on the principle that hot air rises by natural convection. Cold air is drawn up the radiator at the bottom and rises out warm at the top.” ...