Bear in mind that to keep a room at a certain temperature requires a certain amount of heat, which depends on the wall, floor, and ceiling area exposed to outside temperature, how cold it is outside, type of windows, and the degree to which that outer shell is insulated. If that heat comes from a device plugged into a wall outlet, then you're limited to what the circuit will provide without tripping the breaker, typically 1500-1800 watts, or about 5000-6000 BTU/hr. Any plug-in heater of a given wattage (on the label), regardless of type, will provide the same amount of heat, and the efficiency is the same, 100%. All the power input to the heater turns up as heat in the room.
|