confused on which boiler to choose

[mysteryman]

Well, it will obviously be lower.

 

[bengasman]

Well, it will obviously be lower.

One thing that makes me wonder. You come across as if you should be considered the ultimate heating engineer, yet I can not recall a single time when you actually came up with a precise ( and correct ) answer that could not be googled.

Are you actually a RGI?

If you can not tell me what the return temp should be, maybe you can explain to me why the flow has to be below 53.
I have always been told on manufacturers' courses that the flow temp does not make the slightest bit of difference. Are they wrong?

 

[gasafengineer]

Are you actually a RGI?
quote]

Why would that be an issue?

 

[bengasman]

More a matter of explaining why he nver knows the answer.
I noticed that despite your "name" you dont appear to be one either.

 

[gasafengineer]

. The FLOW temperature needs to be below 53C for full condensation to occur, and properly set up weather comp will achieve this for about 95% of the heating season
.

What you have to consider here is the minimum flow temperature must be set somewhat higher than the design room temperature (21k) , failing this mean radiator temperature will be too low at part load conditions & room temp WILL fall.

 

[bengasman]

design room temperature (21k) ...

I'd say most design roomtemperatures will be higher than 21K

 

[gasafengineer]

design room temperature (21k) ...

I'd say most design roomtemperatures will be higher than 21K

To what type dwellings are you basing this information on?

 

[gasafengineer]

I noticed that despite your "name" you dont appear to be one either.

I have no argument with you so why the dig?

I asked you what is the relavance between weather compensation & being a gas registered installer?.

 

[Agile]

Have you mentioned radiator convection currents yet? And the way they render the output non-linear with temperature difference?

 

[gasafengineer]

I'd say most design roomtemperatures will be higher than 21K

Then i suggest you design a better system for your clients.

 

[gasafengineer]

Have you mentioned radiator convection currents yet? And the way they render the output non-linear with temperature difference?

Do you mean 'radiation heat output rate? , not to be confused with 'radiator convection currents' , it is important when estimating radiation heat output that the correct area is used , taking a double panel emitter for example only the front surface will 'see' the room.

 

[bengasman]

I'd say most design roomtemperatures will be higher than 21K

Then i suggest you design a better system for your clients.

I design my systems to the requiements of the client, I have never had one that wanted 21K, nor do I expect I will ever find one that will want that as it is too cold for comfort.

 

[bengasman]

I noticed that despite your "name" you dont appear to be one either.

I have no argument with you so why the dig?

I asked you what is the relavance between weather compensation & being a gas registered installer?.

A RGI is expected to know about wc, you obviously don't.
Apart from that, I distrust people that insinuate to be something they are not.

 

[gasafengineer]

I design my systems to the requiements of the client, .

To what temperatures does the client require?

 

[gasafengineer]

A RGI is expected to know about wc, you obviously don't.
Apart from that, I distrust people that insinuate to be something they are not.

Which gas assesment covers WC? er..none?

Whether you distrust me or not i won't loose any sleep over it , it seems one has to be a member of the CC in order to be gas registered , how sad.

Just for clarity , room temperature values of around 20k are recomended by CIBSE , why are you different? , maybe you design your systems for occupants of UFOs?