Navien heat exchangers do not need cleaning. All self cleaning boilers need is flue gas sensors to determine of the burner is out. If so it is flagged on the display, or if so bad it locks out.
EVs do not need servicing. But the rolling parts do need a walk around. The MOT does that.
Think I worked out it was roughly the cost of a replacement boiler assuming the normal life span of one. Unless you had a boiler BG supplied and fitted, of course. ;-)
Quite. What I liked about the Viessmann.
My one fault was a split rubber hose, which took out the gas valve. Oddly, the original drawing of the boiler in the manual doesn't show this rubber hose. Copper pipe all the way. May have been added to further improve NVH. It looked to be a silicon rubber one - so may have been unlucky it split. That type seems to last forever in a car.
Intergas and ATAG are listed - mid table by both engineers and households. It's quite a complicated mix of scores and methods. I find the Which guides a useful starting point, but not much else.
And the source(s)for all that ...?
Me, my name is on it.
They have a kit to change the rubber to copper pipes. Get it. The rubber disintegrates causing problems like impellers on pumps disintegrating. The idea of the rubber water tubes was to move them out of the way for accessing components behind when repairing. Some makers, Ideal, Baxi, Viessemann have plastic hydroblocks. These cause water leaks after a while where pipes join because of the shocks of mains water. The makers say they are fine. Responsible installers knowing the problems install small shock arrestors on the cold water main just before the combi. This prevents/reduces the problem. Viessmann now have a shock arrestor inside the combi. At least Viessmann has recognised and addressed the problem.
The likes of Intergas only use metal where water is.
Speak to installers on what is the best boiler and some really odd logic is used. Some know a little about a small handful of boilers they are familiar with. Or the boiler they get a good deal with. They are totally disinterested if it will be around in 10 years time, or how efficient it is. I know some who only fit Ideal and Baxis, because they know the error codes on them, not understanding other makes.
Householders would say it is great that the serviceman came the next day and fixed it, giving top marks, forgetting that the thing actually broke down in the first place. Most householders would not recognise good piping from bad piping, only looking at the badge on the white case.
Am I the only long-standing member here who is reminded of our late(?) lamented(??) International Man of Mystery, aka. Doctor Drivel?
(John is not necessarily expected to understand this)
You got me on that one.
Very much so. John Burns was at least part of his real name.
Thought it was Burns-Curtis?
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