Quote:
Originally Posted by derekgas
Neil, the gadget is called a flue gas analyzer, I have 4 of them
|
Does it not depend when you check them? I was under the impression that testing them from cold will give better results than when the house is nice and warm and the boiler return temps are higher as the condenser will have to do more work.
They are more efficient at certain times but I can never remember which way round it is, its either running flat out making hot water or tickling along running the heating.
Another reason why I don't some of them is they have aluminium condensers. The condensate is very corrosive and slowly eats away the aluminium. The fabricated stainless steel condensers are better but more expensive.
I think in the end my dislike comes from the initial high cost for the boiler and the crazy spare part price - then again that can be true for most combi's