I think the electric heater isn't that much. You pass electricity through a piece of metal and it heats up. Add switches and a cover so you don't touch hot or electrical things and you're done. There is no fan, which is a big plus for me as it allows the device to work silently. That's only 1000 watts, which is enough to get rid of the cold without blowing circuit breakers. If you're looking for something that can kick ass, you're going to need a 1500W unit.
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