ive heard of them , im one of the directors!
in reply to some of the posts:
the pre - filter used is a 10 inch filter that we install as an EXTRA, these merlin units run without these, it is installed to increase the life of the merlin carbon filter.
the reason it is a 10 inch filter and not a 20 inch filter is due to the fact that a 20 inch is more than twice the price of a 10 inch but does not give twice the life. so although the filter needs to be changed more often, when you work the cost out per year its cheaper.
we can do systems with the 40-40 R.O units, the one pictured on the website is only an example of one kind we do (using the merlin R.O).
the demin cartridge in the photo is the one that was requested for the customer. a bigger cartridge can be installed but they obviously cost a few quid more.
as for the tank being "too small", its 1.4 mtrs high and 900mm wide, it holds over a 1000ltrs of pure water.......if you want it bigger we can do it but this is plenty big enough!