On Tue, 09 Mar 2010 18:05:29 +0000, John Rumm wrote:

If you stick a phosphate dosing unit (like a "Combimate" for example) in
front of the combi then it should not suffer scale problems. That should
then bring the decision back to the basic one of which better suits your
requirements.

The Culligan SFWH1 whole house unit has many times the capacity of the
Combimate and does the same job, and is about £40 from Screwfix
including the extra fittings you'll need. Bit more fiddly to fit though
(hint: 3/4" bath tap flexi connectors fit the plastic 3/4" bushes that
come with it; any other 3/4" Male fittings you try to use on it are liable
to strip the threads).



--
John Stumbles -- http://yaph.co.uk

Fundamentalist agnostic