Modern combi's have anti-cycle controls and also stat/programmers do too. cycling will be minimal for each, and more than just having one boiler,.
_________________________________________ Usenet Zone Free Binaries Usenet Server More than 120,000 groups Unlimited download
.....He enters again...what will we expect this time... brace yourselves....
...he says "good point", when it wasn;'t a good point. Well 0/10 for that one.
_________________________________________ Usenet Zone Free Binaries Usenet Server More than 120,000 groups Unlimited download
...illogical one is at it again....wee shall see.....
..he tried but as wee all see couldn't make any sense at all...
_________________________________________ Usenet Zone Free Binaries Usenet Server More than 120,000 groups Unlimited download
Yes, but it's a simplicity v. efficiency v. redundancy equation. At home I've got one combi, 2 heating zones controlled by
2xCM67's controlling 2MV's: maximum efficiency but no redundancy and the extra failure point of the MV's. Two combis (or one combi and a system boiler each feeding its own heating zone might lead to increased cycling in mild weather but would reduce the risk of being without heating and would, as IMM says, require much less wiring. But I'm less than convinced that it really makes sense in a normal home, though you might argue that the £50 for the additional boiler service is a much cheaper form of insurance than BG or a boiler maker's emergency service cover.Our church heating, oft cited here, has two boilers and one heating zone with a basic control system to try and ensure that only one boiler runs when only one is needed. The upside is that we always have some heating even if a boiler fails; the downside is that four pumps are running instead of two. If there's some problem with church heating it's a bit late to discover it at
1000 on a Sunday morningUltimately IMO there is no 'best': each option has its own advantages and disadvantages.
If the boiler and cylinder need updating, there is no extra capital cost, you also get two zones thrown in for free, and the on-demand water heating.
If it is, and some don't, it is not worthy of consideration.
Total crap. A combi requires one flex connected to two terminals and a mains cable. THAT IS IT!!!!!!! That is totally DIYable and a no brainer. You can connect up the combi to a 3 pin plug and Part P has nor been violated.
The US has only recently discovered instantaneous water heating. It is increasing in sales. It is regarded as more eco and less to run. In some parts of the US gas is more expensive than electricity. In the UK gas is about 1/4 of electricity per kW. In the US, the differential varies a lot.
_________________________________________ Usenet Zone Free Binaries Usenet Server More than 120,000 groups Unlimited download
Hardly any at all. Only a stat wire.
Read my post on advantages. Clear, very clear.
That is true.
Some have more advantages than other. In an average home, can be a very large home, with 2 showers and one bath, a two combi setup is hard to argue against, as all logic dictates for it. And as you have pointed out with the insurance of an extra boiler keeping BG from ripping you off. It is also highly cost effective, sinple and reliable, which escapes many here. As you see here the detractors come up with twiddling piffling childish arguments. Because they have never come across it before a mental block occurs. How very British.
If a body jet shower is required then two combi's may not hack it, depending on flowrate of course. If around 25 l/min for the shower then the two combi's will do just do it with colds added of course, but no bath would be run simultaneously, although if in the same bathroom as the shower the bath would not be run anyway.
If larger flows are required then an integrated heat bank would be required, probably again using two boilers, with each connected directly to the heat bank. 58kW really does heat up fast, and when reheating, and using the heat bank, the power of the two boilers and the energy in the stored water will give a hell of a flow rate for quite a time. And of course the built-in redundancy. Two 15/26 kW boilers is usually cheaper than one 190,000 BTU/hr boiler, which gives no redundancy.
_________________________________________ Usenet Zone Free Binaries Usenet Server More than 120,000 groups Unlimited download
Ok then. I don't claim to be a pro. So I'm asking you to give some real world total costs of installing two combis against one combi of comparable output. Since you claim to have done this on many occasions, you should be able to delve into your accounts and give actual examples.
So which are you? A heating engineer, as you've often claimed, or one of the amateurs you so despise? I think we deserve to be told.
But I suspect you're a plumber. All that talk of flex...
...yes again he comes in with totaly inane off topic babble... just read...
.....and that has a lot to do with wiring a combi? .. ...the men with the white coats should be called in...
_________________________________________ Usenet Zone Free Binaries Usenet Server More than 120,000 groups Unlimited download
....after miserably failing he is coming back again.....I wonder why?
Min Requirements: two zones
2 showers 1 bath Limited space in house.W-B Junior £493 + 41 flue flue = £534 x 2 = £1,068. If you look around you get two boilers for less than this. gives 20 l/min combined
W-B 440 Highflow £1098 gives 18 l.min Too low so, doesn't make it. This is a stored water combi, so an infinitely continuous combi with 20 litres/min will be:
W-B Greenstar 40kW combi £1166 gives 16 l/min Too low so, doesn't make it.
To get 20 litres/min you need to go up to ECO-Hometec and spend about £1,700 - £1,800
So, a saving of about £750 to start with. Then no zone valves, wiring centre, etc to get two zones. More savings.
A two combi set up just needs 2 stat/programmers, what you would need with any 2 zone setup.
Boiler W-B Greenstar £784 zone valves, wiring, cyl stats, wiring centre etc. approx £150 plus for good makes. unvented cylinder/heat bank, (£984 for 250 litre Megalflo) extra piping and fittings, could be £200-300 (copper is at a world high)
Total £2218, which is over twice the price of two combi's. If you go to a
300 litre Megaflo to get some time in two simultaneous showers then even more. As two combis will supply two showers all day and for ever, pumping 48 kW into DHW for ever. The cylinder cannot compete in performance here. Then you have a large cylinder taking up valuable spaceThen there is the advantages I have already highlighted:
Only disadvantage is slightly more expensive on regular servicing, which is overwhelmingly offset by the above points
Now go away and think about it, hard I know, and don't back with caber tossing silliness.
_________________________________________ Usenet Zone Free Binaries Usenet Server More than 120,000 groups Unlimited download
Well, doh. You put two showers in the same enclosure. Then you can wash both sides of you at once. Or if you have a bigger enclosure you can have a two-person shower with separate temperature control for each person.
Owain
You've just proved your lack of any basic understanding of electrics. But then, you'll not find the finer points easily on a website...
I asked about real world installation costs - ie including labour. Yet again you give an answer to the question you'd prefer to have read.
.....after cutting the caber, he is back.....
...he is snipping now...
Good advice from me above there....then he spoils it all by being distracted by cabers.....
...and he comes out with silliness, after me telling him not too. Would you Adam & Eve it! Well I tried with our resident caber tosser, but to no avail........ Sad but true.
_________________________________________ Usenet Zone Free Binaries Usenet Server More than 120,000 groups Unlimited download
..our redisnet cabnbver tosser says...yes he does....
...I quite rightly replied.....
...and he continues with inane babble...
....I know what you are all thinking, and sad it is to read too. Sad but true.
_________________________________________ Usenet Zone Free Binaries Usenet Server More than 120,000 groups Unlimited download
..our resident caber tosser said.......silly I know...
|> > needed to get clean in those
..well some imaginative suggestions...
...fun too...
_________________________________________ Usenet Zone Free Binaries Usenet Server More than 120,000 groups Unlimited download
:-)
On the one hand, it may be hot, and on the other hand, cold?
In article , Dave Plowman (News) writes
Dunno, but I think he must have stopped taking his medication.
...another one, a mate of our DIYing caber maker, imparts widom to the group.....see this....
...Bruce Forsyth is still safe in a job then.....
_________________________________________ Usenet Zone Free Binaries Usenet Server More than 120,000 groups Unlimited download
I read it, a turd no matter how dressed up is still a turd.
Have something to add? Share your thoughts — no account required.
Ask the community — no account required