"John Rumm" wrote in message
o.uk...

Vaillant seem to be building a good reputation

Overrated.

WB was for sometime frequently recommended,

Now garbage.

Others in this group have had good results with Viseman, Man Eco Hometec,
& Keston.

Viessman is good, Keston is now not much better than scrap metal. The best
is ATAG. The ATAG EC325C has an integrated gassaver and weather
compensation.