radiant electric heater heat objects and people directly in front of the heater. they are a good choice if you want instant heat or if you're staying in one spot. many radiant heaters glow when they're on and may be too bright for nighttime use in a bedroom. portable heaters warm air in a room by blowing or pulling the air over a heated ceramic plate or metal coil element. some convection heaters have fans, which heat a room quickly but are noisier. oil-filled radiators are very quiet and provide consistent temperatures.
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