IT all boils down to (couldnt help it!!!) Heat transfer from flame to kettle and from kettle to water. I dont know if copper is any better than stainless steel/aluminium at that. Perhaps one gifted with knowledge could answer?
It could simply be that copper is more expensive, i suspect its heavier and more solid than a cheaper one too so that adds to material cost etc...
yeah the idea is Copper is a better inductor (or is it conductor) of heat, so the heat spreads better and faster so the water heats up faster. (Got O'level Physics me!)
Im not a fan of spending more than i need so id stick with a fiver one! I cant see how it would justify the extra £15, youd probably only get a few minutes extra time from it but then if you go a lot then its worth getting as you can use it time and time again, probably a lot longer than a cheaper one.
Obviously stainless steel is by far the worst performer, which is why many stainless steel pans have a copper bottom.
Copper is 1.6 times more conductive than aluminium, however that is only a coating so you would still have to consider the conductivity through the rest of the kettle.
we had a large pot with a copper bottom.I never could tell the difference in cooking time etc.They are heavier,but look much better when they have a copper bottom.
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Topic: copper bottom kettle?
