On: North American versus European distribution system...

[13of40]

Not trying to be snarky, but it seems like for an oven to be less efficient, it would need to be releasing energy as something other than heat.

[unclewaltr → 13of40]

I was not referring to the efficiency of a specific appliance. I didn't mention an oven in my comment. Three phase distribution is more efficient and mechanical appliances designed for three phase can take advantage of that.

[monocasa → 13of40]

Or it doesn't insulate as well and has to inject more energy to maintain a certain temperature.