Answered

____________ heating systems involve circulation of the air in a room.

-radiant

-convection

Verified Answer :

Trisomy21

The answer to that would be convection

The given blank can be filled with convection heating systems.  

A heater that works by air convection currents circulating through the body of the appliance, and across its heating element is known as a convection heater. This heats up the air, making it elevate in volume and so make it to rise and buoyant.  

A convection heater may exhibit an electrical heater element, a steam coil, or a hot water coil. Due to natural ventilation, they are quieter in function in comparison to the fan heaters.  

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