Bert Coules wrote:

Has anyone here used one of these no-salt water softeners?
http://www.centralheat.co.uk/monarch...ener-s15t.html

It seems to be a plumbed-in equivalent of a Brita filter, I use the
latter for the coffee machine and to make ice cubes, but it will only
reduce, not eliminate, limescale. Therefore it may not have the
expected benefits for a whole-house installation.