Convection heaters are designed to heat the air in a room and distribute it as evenly as
possible. They're good for background warmth, especially in well-insulated houses.
Convection heaters warm the air around the heater. This warm air then rises and is
replaced by cooler air which is in turn heated. While this means all convection heaters
create a certain amount of air movement, it's not usually enough to distribute the
warmth evenly throughout the room.
This maintains a desired average room temperature (as long as it's within the heater's
capacity), and should have a control that's easy to read and set.