On Mar 11, 9:34*pm, "Triffid" wrote:
harry wrote:
On Mar 11, 5:55 pm, "Triffid" wrote:
John Rumm wrote:
On 11/03/2011 14:56, harry wrote:
On Mar 11, 9:10 am, wrote:
OK, this changes from time to time I guess.
I may be getting a new combi boiler , about 30kW.
Up to a 1000 quids.
What is the most reliable boiler around at the moment for that
spec ? I.e. one that has the vaguest hope of lasting 10 years (I
know its ridiculous !)
Gas chap recommends Vaillant ...
Cheers,
Simon.

Don't bother with a combi. They are ****e of the devil. Put in a

You seem determined to steal dribble's crown harry.

conventional system ie with roof tanks and the HW storage tank
(well lagged). There's such a thing as too much technology. You
will still have to have a condensing boiler. It will cost you more
but there will be far less trouble and expense with repairs and
spare parts.

Huh?

What is the difference between a system boiler, and a combi? Answer
a small PHE, and a diversion valve and a flow switch.

What do you need to make a system boiler usable with a cylinder?
Zoning valves of some description. So the overall difference in
*system* complexity is approaching nil.

This also means you can install a solar hot water roof panel which
you can't with a combi. Also your bath will fill quickly.

The problem with all these numpty responses of "combi = good all
else evil" and their inverse, is they ignore the real world. There
are plenty of cases where one type of system is going to be vastly
preferable to the other, and to blindly insist on only the one
"allowable" solution demonstrates either ignorance or stupidity.

I agree. It's horses for courses. A condensing combi suits my
household because there is only one bathroom and just the two of us.
If we had an en-suite and wanted to shower at the same time, a
conventional storage system would probably be a better bet.

--
Kev- Hide quoted text -

- Show quoted text -

Combi boilers were made for one purpose only. To fit in new houses.
Cheaper than a conventional system and can be fitted with semiskilled
labour.

Absolutely stupid removing an existing DHW cylinder/header tank(s)
just to put in a combi.

Keep It Stupid Simple is always the way to go. * Minimum technology to
achieve requirements.

Well, I hear what you say, but the significant advantage for us was being
able to get rid of the airing cupboard in the bathroom and replace it with a
walk-in shower. Because the new shower has clear glass doors it has made the
bathroom appear much larger as well.

Having instant hot water always on tap is also a bonus.

I agree with the need to keep things simple - and our plumbing system is now
a lot simpler than it was when it had two header tanks in the loft and a hot
water cylinder in the airing cupboard. (I got �75 scrap for the copper tank
and redundant pipework when the job was done)

There is now no float valves to stick or go wrong in the loft, no chance of
any leaks or bursts in the loft, no motorised valves in the system to stick
or go wrong.

I couldn't believe the amount of gunge there was in the bottom of the cold
water tanks in the loft either!

--
Triff- Hide quoted text -

- Show quoted text -

All the items you mention still exist in more complex unreliable form
inside your combi boiler. The crap in your tanks was in the incoming
water. Goes straight into the boiler and helps bugger it up. The bits
you had before were many years old and still had usefull life in them.
Your combi will start to go wrong in only a few years if you're lucky
& henceforth you will have nothing but trouble and expense.
It is filled with cheap nasty crap designed to see it through the
guarantee period & that's all.