wrote
Andy Burns wrote

Then they came for vacuum cleaners, soon kettles and toasters.

How *do* you make a toaster more efficient?

I'm surprised no-one's said it.

Because they understand the physics. It won't work.

Put the element in a glass envelope

That is done already with some heaters, not for toasters
tho, because that produces a much too local source of
heat so you would only get bands of toasted bread.

so it requires less power to keep it radiating.

Thanks for that completely superfluous proof that
you have never understood the most basic physics.

Then mostly enclose the bread space so it loses less heat.

Using a convection oven does that already,
http://www.hotairfrying.com/wp-conte...ction-Oven.jpg

They do toast fine. Not as efficiently as a normal toaster tho.

But of course it's political games driving the desire.

Nope. It does make sense to toast more efficiently.

If there were a visible worthwhile upside to such designs,
would someone not offer them at some point?

They do. Doesnt mean that the less efficient toasters arent
also available tho, because they are much cheaper to make.