Hold your horses. There are power vent water heaters that simply have a tube type chimney with baffles going up through the middle of the tank, and there are high efficiency power vent water heaters which have a series of coiled tubes running through the tank. (see how its made on netflix) The HE type are significantly more expensive than the simple tube type, and once you hit that price point, I would opt for an on demand unit. Staying with the Kiss method, I would stick with the simple convection heater, especially if you suffer power outages, as the other poster smartly stated. You can always take a nice warm shower in the dark, then hit the sack with your nook (As long as you have a mini-volt gas log or a good ole wood burner) (Thats why I don't like pellet stoves either, no power, no heat) As you can probably tell, I do not like depending on the power company, even though they are very good where I am. I think its an independent Finn thing. :huh: