can we change to a combi?

[ChrisR]

You have obviously never even thought of it. Even Screwfix sell one at 9kW for £99,

You want to use a shower unit?
You're nuts. I daresay you'll take that as a compliment.

 

[billy bob]

If you prove annual service history, which costs..and they can do this:
http://www.waterheaterblast.com

This water heater blast web site that gets put about gets really boring, firstly I could make a combi boiler or a thermal store blow up if I removed all of its safety features and put it under extreme conditions, as has been done on this web site, secondly it is an american web site, thirdly it was carried out in a field, if you can show me a situation where this has happened to an unvented cylinder in a house in the UK under normal working conditions, I will agree with you, if not, be quiet and stop scaremongering.
oi

Just as well it was in a field, as the house would have crumbled. ..and they do crumble when of these go up. Wow a whoof!!!! One of those in house? Mmmmmmmm.

An American web site??? Is the world different over there? Different air, gravity, etc? Wow!!!

.

Well show me one that has exploded in a house in the UK, you either state a fact that these are dangerous for which you have to have evidence, or you just spread rumours, so either prove your opinion of unvented cylinders been dangerous, or keep quiet.

 

[WDIK]

Well show me one that has exploded in a house in the UK, you either state a fact that these are dangerous for which you have to have evidence, or you just spread rumours, so either prove your opinion of unvented cylinders been dangerous, or keep quiet.

dont think you will find its happened. all the safety devices are there for a good reason

it only takes one numpty though.

more chance of a header tank softening and collapsing due to a stuck immersion stat and no high limit

 

[numpty1]

Well show me one that has exploded in a house in the UK, you either state a fact that these are dangerous for which you have to have evidence, or you just spread rumours, so either prove your opinion of unvented cylinders been dangerous, or keep quiet.

dont think you will find its happened. all the safety devices are there for a good reason

it only takes one numpty though.

more chance of a header tank softening and collapsing due to a stuck immersion stat and no high limit

you called

 

[WDIK]

"numpty1"799051 you called

sorry

 

[one numpty]

Well show me one that has exploded in a house in the UK, you either state a fact that these are dangerous for which you have to have evidence, or you just spread rumours, so either prove your opinion of unvented cylinders been dangerous, or keep quiet.

dont think you will find its happened. all the safety devices are there for a good reason

it only takes one numpty though.

more chance of a header tank softening and collapsing due to a stuck immersion stat and no high limit

you called

I think he was talking to me!

 

[WDIK]

plonker then







do we have a plonker out there

 

[numpty1]

Well show me one that has exploded in a house in the UK, you either state a fact that these are dangerous for which you have to have evidence, or you just spread rumours, so either prove your opinion of unvented cylinders been dangerous, or keep quiet.

dont think you will find its happened. all the safety devices are there for a good reason

it only takes one numpty though.

more chance of a header tank softening and collapsing due to a stuck immersion stat and no high limit

you called

I think he was talking to me!

imposter,or is it imitation is a form of flattery ,anyway you get nothing for a pair on this forum

 

[Doctor Drivel]

Look at this link: Look at the adder1969 post.
http://tinyurl.com/2yamww


"A water heater exploded in the block of flats I used to live in - it took out most of the partitions walls and most of the windows in the flat in which it happened. It had been leaking alot and we suspect that someone blocked up a safety valve to stop the leak.

AFAIU local council can choose to not allow unvented systems but I would think that would be unlikely. Thus, I think you need approval before the work begins. "


Look at this unvented Kabooom:
http://seattlepi.nwsource.com/local/33094_boom28.shtml?

 

[billy bob]

I said show me facts of an unvented cylinder exploding in the UK, the post by adder 1969 we only have his word for it, no real proof, but he starts of by calling it a water heater, thats not unvented, the second of your links is an American news item, that happened in the USA, that is not the UK.

 

[Doctor Drivel]

I said show me facts of an unvented cylinder exploding in the UK, the post by adder 1969 we only have his word for it, no real proof, but he starts of by calling it a water heater, thats not unvented,

It was clear he meant an unvented cylinder.

the second of your links is an American news item, that happened in the USA, that is not the UK.

Do you mean the atmosphere in the UK means things can't explode?

 

[oilman]

Just answer the question (he wont).

 

[tonybhoy]

Look at the Ethos combi, they are highly cost effective.
http://www.ethosboilers.co.uk/products_54c.php
It actually gives 23 litres/min @ 35C temp rise, capable of supplying two bathrooms. It takes an OpenTherm room temp controller. The Honeywell Cronotherm will do. It modulates the burner via the controller.

Quite interested in this but you would more than likely have to upgrade the gas meter to a U16 and the gas supply from the meter to the boiler with 35MM pipe for the 54KW model,surely?

Tony.

 

[Slugbabydotcom]

Uninknoewledgable

Some unknowledgeable people can spell the word!

I was wary of the 108.5% efficiency. It sounds as full of it as Dr Drivel.
I looked it up on boilers.org.uk and found that it has a sap rating of 90.3%

Not bad at all.

You have never heard of 108% efficiency in heating?

Not without some free energy coming from somewhere! Enlighten me! I would like to play a fruit machine that gives 108% payout if you can tell me where there is one. Since when was a SAP rating of 90.3 better than one of 90.7?

A Ravenheat CSI system boiler gives you 90.7% Turns out that they also are indulging in this net efficiency convoluted bo¬¬ox. But I will stick with the SAP rating which to me means that if you spend a pound on fuel you will get 90.7p worth of heat from it @ 90.7%.

Are you serious? Ravenheat. The FIAT of the boiler world. All they ever do is leak. Total scrap!

Total scrap if you like, with an atmospheric burner at a third of the cost and with a higher SAP rating. Did you say Giannoni burner? like what everyone else including Ravenheat uses in their premix models? I dont want to knock your toy too much cos I actually like it. It ticks the British design box, It is put together by the Dutch who I trust more than the Italians when it comes to quality but the parts in it are still the same as found in other boilers with the exception of the DHW coil which I haven't come across before. I notice that an expansion vessel and a PRV still need to be purchased.

When Ravenheat introduce their new energycatcher a cylinder will again become the norm and a twin coil cylinder preferable as this will allow for solar pre-heating. This energycatcher robs the fumes of the last dregs of heat and uses them to preheat your water so you will still be able to attain high flow rates.

A pre-heat top box? Nothing new and they are "expensive"

And due to the demands for lower carbon footprints they will be getting more popular. How much do you think it will cost for one? Is £400 too much? I expect there could be grants available for kit like this sooner or later.

but to bring this into perspective it requires the installation of an unvented pre-heat storage cylinder.

That rules them out then. Tell then in Leeds to go thermal storage. Much better, much more efficient and doesn't take down the side of your house. They were never that bright at Ravenheat!!!! Such cheap scrap!

No reason why it can't be used with a thermal store which is still technically speaking unvented

What a sad post.

I agree and think you should stop making them

 

[billy bob]

I said show me facts of an unvented cylinder exploding in the UK, the post by adder 1969 we only have his word for it, no real proof, but he starts of by calling it a water heater, thats not unvented,

It was clear he meant an unvented cylinder.

the second of your links is an American news item, that happened in the USA, that is not the UK.

Do you mean the atmosphere in the UK means things can't explode?

Nothing to do with the atmosphere, unvented cylinders may of exploded in Outer Mongolia for all I know, but I don't care, the cylinders in the UK are not the same as the USA, we have more safety devices even more than Germany, so unless you can show hard eveidence of one exploding in the UK stop scaremongering