In message , Peter Scott
writes
Viessman not mentioned.

What struck me was how b****y awful the reliability figures are. For
even the best ones a quarter failed in the first four years. Is it
because these condensing things are relatively new and the
manufacturers are still experimenting?

It doesn't inspire much confidence.

Presumably *faults* would include system design/installation errors
rather than just defects within the boiler itself?

My wife has just been bitten by the Potterton cct. board bug. Letting
agent called in a plumber who changed the board for 200ukp!

regards

--
Tim Lamb