Indirect Unvented Cylinder Opinions

[Mike2007]

Questions. Is this an "on demand" system or stored, surely both wont work? Second if its on demand how you gonna get you cylinder up to 65 degrees (killing legionella)?

 

[billy bob]

Drivel, whats this http://i171.photobucket.com/albums/u292/silverback_2007/DSC01465.jpg an unvented cylinder of a vented thermal store

 

[Balenza]

Billybob wrote

an unvented cylinder of a vented thermal store

Well since every one thinks I am DD anyway I will give you an answer and I think you are asking "Is this an unvented cylinder OR a vented thermal store" ?.
Well the answer is neither.

 

[billy bob]

What is it then?

 

[Balenza]

What is it then?

A sealed thermal store probably of German origin. Certainly looks like quality German engineering as I have installed German manufactured thermal stores and they know how to construct a cylinder.
Looks like a solar input coil at the bottom and HW draw off coils at the top.
The middle section coils possibly pre heat HW coils.

 

[billy bob]

It is a sealed thermal store, but would you and Drivel consider these as dangerous as they have the same capability to explode as an unvented cylinder, in fact it has more risk, it has less safety devices as it does not come under G3

 

[Balenza]

It is a sealed thermal store, but would you and Drivel consider these as dangerous as they have the same capability to explode as an unvented cylinder, in fact it has more risk, it has less safety devices as it does not come under G3

A lot less dangerous as you only have handful of them installed in the country compared to the prolific installation of UV cylinders being fitted by every tom, di@ck and harry who haven't a clue.

 

[billy bob]

It is a sealed thermal store, but would you and Drivel consider these as dangerous as they have the same capability to explode as an unvented cylinder, in fact it has more risk, it has less safety devices as it does not come under G3

A lot less dangerous as you only have handful of them installed in the country compared to the prolific installation of UV cylinders being fitted by every tom, di@ck and harry who haven't a clue.

So danger only occurs when it is in quantity does it, it only takes one to go badly wrong to be dangerous, so whether there is 1 or 1,000,000 makes no difference, so are you saying that they are safer in your opinion purely because there are not so many installed

 

[Balenza]

billybob wrote

So danger only occurs when it is in quantity does it,

Thats correct.

it only takes one to go badly wrong to be dangerous,

No it only takes an inferior installation to make one dangerous.

so whether there is 1 or 1,000,000 makes no difference,

Their is a difference. Have one UV cylinder installed in the entire UK then the risk is minimal.
Have millions then the risk quadruples.

so are you saying that they are safer in your opinion purely because there are not so many installed

Yep. And lets hope that situation remains so. A vented heat bank is much more superior in my view for a domestic installation.
Any of these large thermal I have installed were in plant rooms and well away from inhabitated areas so if they go then the risk of them injuring or killing someone is minimal.

 

[billy bob]

Vented systems, my word you are prehistoric, vented system sludge up, they ingress air and are unreliable
You have answered your own argument, it only takes an inferior installation to make one dangerous, this applies to vented or unvented, but the only ones I am aware of are vented systems that have been installed poorly that have become dangerous, I am not aware of any unvented cylinders being dangerous through poor installation and neither are you, otherwise you would be able to point us in the direction of the proof, something that you and drivel have failed to do.

 

[doitall]

No check valves on the cold feed or mains then drivel/balski

You haven't answered my question drivel what happens when the cylinder faults at 3 bar

 

[Balenza]

Billybob wrote

Vented systems, my word you are prehistoric, vented system sludge up, they ingress air and are unreliable

In your world they probably do.

You have answered your own argument, it only takes an inferior installation to make one dangerous,

And the fact that safety devices can fail through time. Did I mention that. OOps silly me.

this applies to vented or unvented,

A vented system has no requirement to have registered specialist installers installing them and no annual service. Thats a plus in my book.
Unvented does and the numptys and unregistered are installing them wholesale.

but the only ones I am aware of are vented systems that have been installed poorly that have become dangerous,

Cylinders and tanks. Yes I know , I have them in my home.
A heat bank would cure my problem though and I fully recognise that.

I am not aware of any unvented cylinders being dangerous through poor installation and neither are you,

They are numerous. An Australian couple were killed recently when the blast knocked the walls out and the concrete bison slabs fell on top of them. Very sad.

otherwise you would be able to point us in the direction of the proof, something that you and drivel have failed to do.

Its been happening through out the world for years and people end up injured or killed.

 

[Doctor Drivel]

Vented systems, my word you are prehistoric, vented system sludge up, they ingress air and are unreliable

This one really hasn't a clue. This is sad. A Panadora and many Gledhill thermal stores/heat banks the water in the cylinder goes nowhere at all. Gledhill say there is no real need for inhibitor, but one can will help a little.

Ingress air? How? Gosh! Put enough inhibitor in and a Magnaclean filter on the CH return and no problems. What collects and makes sludge is radiators.

<snip some tripe>

 

[Doctor Drivel]

No check valves on the cold feed or mains then drivel/balski

Welshy/Wurzle, do you hear voices as well?

 

[doitall]

[quote =balski] They are numerous. An Australian couple were killed recently when the blast knocked the walls out and the concrete bison slabs fell on top of them. Very sad.[/quote]

I expect someone got killed boiling a kettle somewhere in the world balski.

Stick to England.

How many have been killed by an un-vented cylinder and wheres the prove