On 28/04/2012 12:09, BartC wrote:


"kent" wrote in message
news:2859757.1168.1335380264153.JavaMail.geo-discussion-forums@vbez18...
This is probably a daft idea, but I'd be interesting to see if there is
any mileage in it! Combi boilers tend to work best in smaller properties,
so for a larger property would it be possible (or make any sense) to have
2 combi boilers serving different parts of the house?
By "larger" I don't mean a mansion I mean a 4 bedroomed house with 3
showers!
Thanks for any thoughts on this.

Do they still do hot-water-only gas boilers?

You mean a "heating only" (i.e. old school boiler with no pump or any
other system components in the box?), then yes, they are called "heating
only" boilers.

I had a house a few years ago with an ancient combi downstairs, and an
equally ancient separate hot water boiler in the upstairs bathroom
(which was supremely reliable; no electrics, just gas and water, and no
secondary heat exchangers and 3-way valves to clog up. Just the
occasional transatlantic call explaining how to ignite the pilot..).

Ah that sounds more like a multipoint instantaneous water heater. Also
still available, but less common than they were.

So each floor had it's own hot water source. And it came in extremely
useful
when the combi started playing up. (In fact I eventually plumbed it so the
upstairs boiler supplied all the hot water.) Unfortunately when the combi
was replaced, the upstairs heater was taken out too; big mistake as I
continued having boiler problems for years.

I would go with a 2-boiler solution, although it would be wasteful if
one is
only used for hot water (and will it even work if the CH flow just comes
straight back without going through radiators?).



--
Cheers,

John.

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