Which combination storage boiler should i go for?
- Thread starter totallymedicine
- Start date
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Credit where it's due, it was Simond who was 1st to spot this time.
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That seems like several points
Size of house is pretty much irrelevant. Combi boilers are perfectly suited to large houses and in fact tend to be thoroughly over-sized for small houses and flats, but they are best suited to situations where hot water requirements are limited to a single use at a time. One shower or bath, and preferably nobody else using hot water at all at the same time. More powerful combis and storage combis can partially work beyond this limit, but there is still a definite limit on the flow rate of hot water available. Anyone who has a routine need for two more-than-so-so showers going at once won't want a combi. Your incoming mains supply will also need to meet certain standards for pressure and flow that should be available in 99.9% of properties but unfortunately often aren't.
Yes, storage combis include a small tank of hot water that is used to supplement the flow rate of hot water for a period of time. The small size means it is suitable for about the length of a generous shower. Recharge time is not usually a big factor as any combi could heat the 50 or so litres in just a few minutes. Storage combis are more expensive to buy and slightly more expensive to run, potentially more expensive to maintain, and still have many of the limits of other combis. They are a good solution for the right situation such as someone who wants a rather powerful shower without buying a stupidly oversized boiler. Beyond the limits of the storage tank they become rather mid-range combis. Use for two bathrooms at once is still pushing the limits and you're likely to find your shower slowing to a light drizzle
Larger storage might give you longer at high flow (check the specs carefully!) but how large do you want to go before you consider a full-size unvented cylinder?One thing you should probably ponder is that "plumbers" hate combis and most people that have them think they're great. Go figure!
These comments are aimed at Gayton, big Burner etc
You mention that a combi passing through a fan coil is the most efficient. Clearly not more efficient than a modern Lennox warm air unit, so why mislead?
The reason God put water in radiators is that it is blessed with a high specific heat capacity. So the rads stay warm for long periods.
Air is not, which is why warm air systems warm up very quickly, but also lose heat similarly fast. Running a combi into a 20kw fan coil for a warm air system will work.
But if someone runs a long shower the house will go cold - the fan coil heat capacity would be exhausted less than a minute after the shower was run.
So, if you are three/four people living in a house heated using Gayton's proposed system, you'll go cold every morning.
It is poorly conceived contrivance, by a Billy Liar individual who posts with multiple aliases, and has even concocted a fictitious case study to support his need for credibility.
You mention that a combi passing through a fan coil is the most efficient. Clearly not more efficient than a modern Lennox warm air unit, so why mislead?
The reason God put water in radiators is that it is blessed with a high specific heat capacity. So the rads stay warm for long periods.
Air is not, which is why warm air systems warm up very quickly, but also lose heat similarly fast. Running a combi into a 20kw fan coil for a warm air system will work.
But if someone runs a long shower the house will go cold - the fan coil heat capacity would be exhausted less than a minute after the shower was run.
So, if you are three/four people living in a house heated using Gayton's proposed system, you'll go cold every morning.
It is poorly conceived contrivance, by a Billy Liar individual who posts with multiple aliases, and has even concocted a fictitious case study to support his need for credibility.
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I outed him in the CC on the 6th Dec!
Oh dear, no prize for me then
Sounds like CC is worth joining for the gossip.
join up Simon, Im sure your contributions will be valued. Alot of people have deserted this side thanks to the amount of trolls and so called "experts" who post here.
That is just rumour, but don't tell anyone.
G
GaytonTonner
Have you any exposure to high flow combis that can do two bathrooms?
Have you any exposure to high flow combis that can do two bathrooms?
Have you any exposure to high flow combis that can do two bathrooms? Like the W-B 550?
A W-B 550 gives 25 litres per minute for 3 minutes and then 17 litres a minute for ever after that.Sounds good to all others.
They do plumbers out of needless rip-off work.
G
GaytonTonner
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G
GaytonTonner
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G
GaytonTonner
Who is big Burner?
The Multicalor gives 20kW,heated by a combi, or any other boiler. IT matches any 20kW Lennox.
God would never do such a pagan thing.
I thought you were sating the Multicalor or J&S Aquair do not work. Air heat up fast which a great advantage. So it cools quick which is irrelevant as when off you don't want the heat.
So, it goes off for 10 minutes or so. Not a problem in modern well insulated homes. I know I have had these fitted.
That is nonsense. Like any combi system you make sure the house is heated up to temp before you get up.
Do you see shadows following you as well. It is clear you do not have any experience of high flow combis hitched to AHUs, as you made all that up.
G
GaytonTonner
Oh dear, no prize for me then
Sounds like CC is worth joining for the gossip.
Who is CC?
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