Re: Kettles
I think you tend to hit a ceiling with efficiency. Physics dictates you can only transfer energy with so much efficiency given the properties of the materials used in the construction of the heat source and container. Trying to improve these probably falls into the realm of diminishing returns due to the need for ever more exotic materials for the heat transfer plus potential reduced safety. I mean, a metal kettle will conduct heat throughout its metallic body, and at least some of this heat will be lost to the outside air through convection and radiation (thus why the sides of the kettle tend to still be too hot to touch even if not directly exposed to the heat).
Biting the hand that feeds IT
