[ajuc]

> It looks like the point of the limescale filter in the picture is for keeping the limescale IN the kettle, and preventing chunks of limescale from pouring out of the kettle and into your teacups.

That's the point, yes. You have tea with lime flakes otherwise.

As for filters I actually prefer the taste of hard water (and the tap water is good to drink where I live, just inconvenient).

As for kettles - most people where I live use the ones you put on your gas stove as electricity is more expansive.

[sokoloff]

It takes around 1/5th kWh to boil a liter of water, or around $0.04 for me (in a place of fairly expensive electricity for the US).

How much cheaper would gas have to be for me to choose gas over electric? Probably $0.25/liter or more cheaper.

[morsch]

People I know with gas or induction stoves use it to boil water because it's faster. This must be doubly true in the US with it's comparatively weak power outlets.

[ncmncm]

I measured. It takes fully twice as long on a gas range burner, with a wide, flat-bottom kettle.

[morsch]

I have no reason to doubt your result for one specific electrical kettle and one specific gas stove.