Is there a maximum 15 mm pipe length from the 22 mm ring?

[ianmcd]

The usual rule of thumb for non condensing boilers was that you could take about 3 kW from 15 mm pipes up to about 3-4 m from the 22 mm.

With a condensing boiler set to a differential of nearly 20C then you could almost double the distance or power.

Tony

Talking absolute shoite as per usual Tony

 

[Agile]

Talking absolute shoite as per usual Tony

The OP asked for "constructive" advice.

It is postings like yours which get so many recent threads locked.

 

[Steelmasons]

The usual rule of thumb for non condensing boilers was that you could take about 3 kW from 15 mm pipes up to about 3-4 m from the 22 mm.

With a condensing boiler set to a differential of nearly 20C then you could almost double the distance or power.

Tony

The above mis-leading advice is the reason threads get locked , had you of given the correct advice Ianmcd would have had no reason to question it.
Advice from non professionals like yourself would be the reason these threads get locked.

 

[Steelmasons]

The OP asked for "constructive" advice.

It is postings like yours which get so many recent threads locked.

What constructive advice have you given with regard to this thread??

 

[Agile]

Tony , had you of recieved the correct training then you wouldn't be making these school boy errors.

Hopefully, most school boys know the "i" before "e" spelling rule!

 

[JohnD]

hope not, because in English there are so many exceptions, so it is no longer widely taught.

Neither is it efficient to forfeit the heights of respect from foreign neighbours when they realise the weight of your beige cardigan.

It may seem weird, but you just have to seize the opportunity.

Drink your caffeine. It's all science.

In English, you have to learn to spell.

Other languages are more logical.

 

[Steelmasons]

Hopefully, most school boys know the "i" before "e" spelling rule!

I don't abide by that rule so a moot point.

 

[gigz]

Never mind the "i" before the "e", where did the "of" come from ?

 

[Agile]

I still take the view that the advice I gave was exactly what the OP will understand and can make use of.

But only he can decide on that.

 

[Steelmasons]

I still take the view that the advice I gave was exactly what the OP will understand and can make use of.

But only he can decide on that.

The advice you gave the OP was incorrect , whether it is understood is neither here nor there.
I clearly understood what you said regarding the max load for 15mm tube being 3kw...I also understand that what you said was complete and utter nonsense.
Hopefully you will exactly understand what I have said.

 

[DP]

Hopefully, most school boys know the "i" before "e" spelling rule!

Does warrantee ring a bell

 

[Dan Robinson]

Science.

 

[Dan Robinson]

neither

Conscience

 

[llChopperll]

Hi All,

I detect a bit of animosity here.
Excuse me for asking but with regards to my original query is it okay or not?
I'd appreciate a layman's answer if possible.

IIChopperII

 

[slippyr4]

It'll work, just about. It's pushing it though. You'd be best doing a separate run for each radiator if you can. You may well have to balance other radiators to get the new ones to heat up well (see the FAQ at the top of this forum).

The "debate" above is because a pipe can only flow a certain amount of heat (energy) - proportional to the amount of, and temperature of water that flows through it. If the temperature is relatively fixed (the boiler's flow temperature) then that amount of heat is proportional to the velocity of water through the pipe. The velocity goes up the harder the pump pushes, but so does the noise. The longer the pipe run, the more resistance to flow their is and the slower the water will go.

It's quite complex fluid dynamics. That's why there are "rules of thumb" which are based on experience of what works and what doesn't. However, it is completely and utterly irrelevant what kind of boiler you have.