Comment Re:16,800 W? - WTF?! (Score 1) 450
Heat pumps work like air conditioners. You use 1 joule of energy to move 2 joules of energy from one place to another. So while it only draws 1 joule, you now have 3 joules of heat at the output side, and 2 joules less heat on the 'sink' side.
Keywords to google for: "coefficient of performance heat pump"
Keywords to google for: "coefficient of performance heat pump"