On Wednesday, 1 March 2017 15:25:15 UTC, jim wrote:
compared with generic pressed steel panel radiators, how
efficient are column rads aka school rads, for same height &
length?

all radiators are 100% efficient.

jim wrote:

compared with generic pressed steel panel radiators, how
efficient are column rads aka school rads, for same height &
length?

a 600H x 100D x 1180W three column ~1500 watts
a 600H x 105D x 1200W double panel/double fin radiator ~2100 watts

The biggest difference you'll notice is the price!

On 01/03/17 15:32, wrote:
On Wednesday, 1 March 2017 15:25:15 UTC, jim wrote:
compared with generic pressed steel panel radiators, how
efficient are column rads aka school rads, for same height &
length?

all radiators are 100% efficient.

well in terms of watts in per watts out yes, but in terms of power per
unit area per degree C they differ markedly

--
Future generations will wonder in bemused amazement that the early
twenty-first centurys developed world went into hysterical panic over a
globally average temperature increase of a few tenths of a degree, and,
on the basis of gross exaggerations of highly uncertain computer
projections combined into implausible chains of inference, proceeded to
contemplate a rollback of the industrial age.

Richard Lindzen

compared with generic pressed steel panel radiators, how
efficient are column rads aka school rads, for same height &
length?

TIA
--
Jim K


----Android NewsGroup Reader----
http://usenet.sinaapp.com/

Wrote in message:
On Wednesday, 1 March 2017 15:25:15 UTC, jim wrote:
compared with generic pressed steel panel radiators, how
efficient are column rads aka school rads, for same height &
length?

all radiators are 100% efficient.


Troll
--
Jim K


----Android NewsGroup Reader----
http://usenet.sinaapp.com/

Andy Burns Wrote in message:
jim wrote:

compared with generic pressed steel panel radiators, how
efficient are column rads aka school rads, for same height &
length?

a 600H x 100D x 1180W three column ~1500 watts
a 600H x 105D x 1200W double panel/double fin radiator ~2100 watts

The biggest difference you'll notice is the price!


Indeed :-)
Cheers
--
Jim K


----Android NewsGroup Reader----
http://usenet.sinaapp.com/

In article ,
jim k wrote:

efficient are column rads aka school rads, for same height &
length?

Don't radiator makers give their output these days? As generic pressed
steel could mean anything.

--
*I don't believe in astrology. I am a Sagittarius and we're very skeptical.

Dave Plowman London SW
To e-mail, change noise into sound.

On Wednesday, 1 March 2017 15:25:15 UTC, jim wrote:
compared with generic pressed steel panel radiators, how
efficient are column rads aka school rads, for same height &
length?

TIA
--
Jim K


The correct name is cast iron sectional radiators.
They have only one advantage; they are very long lived.
They are very heavy, expensive and slow to heat up/ cool down.
Unless you love the appearance!

Never buy second hand.
The sections are assembled together with steel/malleable iron nipples with left and right threads.
These do corrode and if old radiators are moved, often leak.

On Wednesday, 1 March 2017 15:47:29 UTC, jim wrote:
Wrote in message:
On Wednesday, 1 March 2017 15:25:15 UTC, jim wrote:
compared with generic pressed steel panel radiators, how
efficient are column rads aka school rads, for same height &
length?

all radiators are 100% efficient.


Troll
--
Jim K


No, he's perfectly correct.

"Dave Plowman (News)" Wrote in message:
In article ,
jim k wrote:

efficient are column rads aka school rads, for same height &
length?

Don't radiator makers give their output these days? As generic pressed
steel could mean anything.


Expect so, but how would you positively id an existing one?

--
Jim K


----Android NewsGroup Reader----
http://usenet.sinaapp.com/

I don't think you quite got the question or maybe you are being
diplomatically thick.

I imagine what he means is, how much does the extra surface area in those
old cast radiators get more heat into a room over the normal ones. Obviously
if they were so efficient as to make the hot water cold no other radiator
would get hot would it!
Brian

--
----- -
This newsgroup posting comes to you directly from...
The Sofa of Brian Gaff...

Blind user, so no pictures please!
wrote in message
...
On Wednesday, 1 March 2017 15:25:15 UTC, jim wrote:
compared with generic pressed steel panel radiators, how
efficient are column rads aka school rads, for same height &
length?

all radiators are 100% efficient.

On 01/03/2017 16:54, harry wrote:
On Wednesday, 1 March 2017 15:25:15 UTC, jim wrote:
compared with generic pressed steel panel radiators, how
efficient are column rads aka school rads, for same height &
length?

The correct name is cast iron sectional radiators.
They have only one advantage; they are very long lived.
They are very heavy, expensive and slow to heat up/ cool down.
Unless you love the appearance!

Nostalgia for schooldays?

--
Max Demian

On Wed, 1 Mar 2017 20:11:58 +0000, Max Demian
wrote:

On 01/03/2017 16:54, harry wrote:
On Wednesday, 1 March 2017 15:25:15 UTC, jim wrote:
compared with generic pressed steel panel radiators, how
efficient are column rads aka school rads, for same height &
length?

The correct name is cast iron sectional radiators.
They have only one advantage; they are very long lived.
They are very heavy, expensive and slow to heat up/ cool down.
Unless you love the appearance!

Nostalgia for schooldays?

Malleable iron nipples?
What kind of a school did you attend?

--

Graham.
%Profound_observation%

jim wrote:

Andy Burns wrote:

jim wrote:

compared with generic pressed steel panel radiators,
how efficient are column rads aka school rads

The biggest difference you'll notice is the price!

Indeed :-)

I was also surprised to see the steel panel is one heavier than the cast
iron.

On Wednesday, 1 March 2017 15:44:04 UTC, The Natural Philosopher wrote:
On 01/03/17 15:32, tabbypurr wrote:
On Wednesday, 1 March 2017 15:25:15 UTC, jim wrote:
compared with generic pressed steel panel radiators, how
efficient are column rads aka school rads, for same height &
length?

all radiators are 100% efficient.

well in terms of watts in per watts out yes, but in terms of power per
unit area per degree C they differ markedly

So yes they're efficient but bulky. Jim apparently doesn't know what efficiency is.


NT

Wrote in message:
On Wednesday, 1 March 2017 15:44:04 UTC, The Natural Philosopher wrote:
On 01/03/17 15:32, tabbypurr wrote:
On Wednesday, 1 March 2017 15:25:15 UTC, jim wrote:
compared with generic pressed steel panel radiators, how
efficient are column rads aka school rads, for same height &
length?

all radiators are 100% efficient.

well in terms of watts in per watts out yes, but in terms of power per
unit area per degree C they differ markedly

So yes they're efficient but bulky. Jim apparently doesn't know what efficiency is.


NT


Troll
--
Jim K


----Android NewsGroup Reader----
http://usenet.sinaapp.com/

In article ,
Brian Gaff wrote:
I don't think you quite got the question or maybe you are being
diplomatically thick.

I imagine what he means is, how much does the extra surface area in
those old cast radiators get more heat into a room over the normal
ones. Obviously if they were so efficient as to make the hot water cold
no other radiator would get hot would it!

It's the wrong word to use - strictly speaking. Normally efficiency as
regards a heater would be energy in versus heat out.

As you said what's wanted is the heat output of the various types of rad.

--
*And the cardiologist' s diet: - If it tastes good spit it out.

Dave Plowman London SW
To e-mail, change noise into sound.

On Wednesday, 1 March 2017 20:29:13 UTC, Graham. wrote:
On Wed, 1 Mar 2017 20:11:58 +0000, Max Demian
wrote:

On 01/03/2017 16:54, harry wrote:
On Wednesday, 1 March 2017 15:25:15 UTC, jim wrote:
compared with generic pressed steel panel radiators, how
efficient are column rads aka school rads, for same height &
length?

The correct name is cast iron sectional radiators.
They have only one advantage; they are very long lived.
They are very heavy, expensive and slow to heat up/ cool down.
Unless you love the appearance!

Nostalgia for schooldays?

Malleable iron nipples?
What kind of a school did you attend?

Brain dead as ever.
http://www.pfpipetools.co.uk/home/ta...crewed-nipple/

On Wednesday, 1 March 2017 20:12:02 UTC, Max Demian wrote:
On 01/03/2017 16:54, harry wrote:
On Wednesday, 1 March 2017 15:25:15 UTC, jim wrote:
compared with generic pressed steel panel radiators, how
efficient are column rads aka school rads, for same height &
length?

The correct name is cast iron sectional radiators.
They have only one advantage; they are very long lived.
They are very heavy, expensive and slow to heat up/ cool down.
Unless you love the appearance!

Nostalgia for schooldays?

--
Max Demian

The correct name is actually hospital pattern.
This refers to the "plain" ones.

There are/were some very fancy ones also that some people like.
Rich people.

As I worked in hospitals (and the heating systems) for forty years I am very familiar with them.

On Thursday, 2 March 2017 10:55:54 UTC, jim wrote:
"Dave Plowman (News)" Wrote in message:
In article ,
Brian Gaff wrote:

I imagine what he means is, how much does the extra surface area in
those old cast radiators get more heat into a room over the normal
ones. Obviously if they were so efficient as to make the hot water cold
no other radiator would get hot would it!

It's the wrong word to use - strictly speaking. Normally efficiency as
regards a heater would be energy in versus heat out.

As you said what's wanted is the heat output of the various types of rad.


Depends how hot the water circulating through them is :-P

Output is usually quoted for either of 2 standard sets of conditions. Real output can then be calculated easily, as long as you know the temps it's operating at.


NT

"Dave Plowman (News)" Wrote in message:
In article ,
Brian Gaff wrote:
I don't think you quite got the question or maybe you are being
diplomatically thick.

I imagine what he means is, how much does the extra surface area in
those old cast radiators get more heat into a room over the normal
ones. Obviously if they were so efficient as to make the hot water cold
no other radiator would get hot would it!

It's the wrong word to use - strictly speaking. Normally efficiency as
regards a heater would be energy in versus heat out.

As you said what's wanted is the heat output of the various types of rad.


Depends how hot the water circulating through them is :-P

--
Jim K


----Android NewsGroup Reader----
http://usenet.sinaapp.com/

In article ,
jim k wrote:
"Dave Plowman (News)" Wrote in message:
In article ,
Brian Gaff wrote:
I don't think you quite got the question or maybe you are being
diplomatically thick.

I imagine what he means is, how much does the extra surface area in
those old cast radiators get more heat into a room over the normal
ones. Obviously if they were so efficient as to make the hot water cold
no other radiator would get hot would it!

It's the wrong word to use - strictly speaking. Normally efficiency as
regards a heater would be energy in versus heat out.

As you said what's wanted is the heat output of the various types of rad.


Depends how hot the water circulating through them is :-P

That would be a constant if quoting the heat output for comparison
pusposes? Rather the same as you'd not quote the heat output of a 230v
heater run from 110v?

--
*A closed mouth gathers no feet.

Dave Plowman London SW
To e-mail, change noise into sound.

On Thursday, 2 March 2017 13:50:54 UTC, Dave Plowman (News) wrote:
In article ,
jim k wrote:
"Dave Plowman (News)" Wrote in message:
In article ,
Brian Gaff wrote:
I don't think you quite got the question or maybe you are being
diplomatically thick.

I imagine what he means is, how much does the extra surface area in
those old cast radiators get more heat into a room over the normal
ones. Obviously if they were so efficient as to make the hot water cold
no other radiator would get hot would it!

It's the wrong word to use - strictly speaking. Normally efficiency as
regards a heater would be energy in versus heat out.

As you said what's wanted is the heat output of the various types of rad.


Depends how hot the water circulating through them is :-P

That would be a constant if quoting the heat output for comparison
pusposes? Rather the same as you'd not quote the heat output of a 230v
heater run from 110v?

There are lots of other factors.
Eg
How fast water and air are circulating.
Detail of pipe connections.
Fins, if any.
Colour.
Near objects.

On Thursday, 2 March 2017 13:50:54 UTC, Dave Plowman (News) wrote:
In article ,
jim k wrote:
"Dave Plowman (News)" Wrote in message:
In article ,
Brian Gaff wrote:
I don't think you quite got the question or maybe you are being
diplomatically thick.

I imagine what he means is, how much does the extra surface area in
those old cast radiators get more heat into a room over the normal
ones. Obviously if they were so efficient as to make the hot water cold
no other radiator would get hot would it!

It's the wrong word to use - strictly speaking. Normally efficiency as
regards a heater would be energy in versus heat out.

As you said what's wanted is the heat output of the various types of rad.


Depends how hot the water circulating through them is :-P

That would be a constant if quoting the heat output for comparison
pusposes? Rather the same as you'd not quote the heat output of a 230v
heater run from 110v?

There is no energy conversion in a radiator.
There is an energy conversion in an electric heater.

On Wed, 1 Mar 2017 22:41:38 -0800 (PST), harry
wrote:

On Wednesday, 1 March 2017 20:29:13 UTC, Graham. wrote:
On Wed, 1 Mar 2017 20:11:58 +0000, Max Demian
wrote:

On 01/03/2017 16:54, harry wrote:
On Wednesday, 1 March 2017 15:25:15 UTC, jim wrote:
compared with generic pressed steel panel radiators, how
efficient are column rads aka school rads, for same height &
length?

The correct name is cast iron sectional radiators.
They have only one advantage; they are very long lived.
They are very heavy, expensive and slow to heat up/ cool down.
Unless you love the appearance!

Nostalgia for schooldays?

Malleable iron nipples?
What kind of a school did you attend?

Brain dead as ever.
http://www.pfpipetools.co.uk/home/ta...crewed-nipple/

Family tradition has it, that my late mother-in-law was dismissed from
her wartime factory job for slapping her supervisor, who had asked her
to get a bag of grease nipples from the stores.


--

Graham.
%Profound_observation%

"Dave Plowman (News)" Wrote in message:
In article ,
jim k wrote:
"Dave Plowman (News)" Wrote in message:
In article ,
Brian Gaff wrote:
I don't think you quite got the question or maybe you are being
diplomatically thick.

I imagine what he means is, how much does the extra surface area in
those old cast radiators get more heat into a room over the normal
ones. Obviously if they were so efficient as to make the hot water cold
no other radiator would get hot would it!

It's the wrong word to use - strictly speaking. Normally efficiency as
regards a heater would be energy in versus heat out.

As you said what's wanted is the heat output of the various types of rad.


Depends how hot the water circulating through them is :-P

That would be a constant if quoting the heat output for comparison
pusposes?


Oooh so temp of water is same, but different radiator designs give
off more/less heat depending on their "ability to output heat
from system water at x degree C to room air"? But you tell me
it's not called efficiency....

Oooh hang on a mo isn't that where we started?

Maybe more non-plumbers could comment & put us all right....
--
Jim K


----Android NewsGroup Reader----
http://usenet.sinaapp.com/

On Thursday, 2 March 2017 20:55:16 UTC, jim wrote:
"Dave Plowman (News)" Wrote in message:
In article ,
jim k wrote:
"Dave Plowman (News)" Wrote in message:
In article ,
Brian Gaff wrote:
I don't think you quite got the question or maybe you are being
diplomatically thick.

I imagine what he means is, how much does the extra surface area in
those old cast radiators get more heat into a room over the normal
ones. Obviously if they were so efficient as to make the hot water cold
no other radiator would get hot would it!

It's the wrong word to use - strictly speaking. Normally efficiency as
regards a heater would be energy in versus heat out.

As you said what's wanted is the heat output of the various types of rad.


Depends how hot the water circulating through them is :-P

That would be a constant if quoting the heat output for comparison
pusposes?


Oooh so temp of water is same,

it varies in use, but for comparison we select given in & output temps to enable easy comparison, and to readily know what output one gets for standard temps.

but different radiator designs give
off more/less heat depending on their "ability to output heat
from system water at x degree C to room air"?

yup, ie their thermal conduction varies.

But you tell me
it's not called efficiency....

efficiency is energy out over energy in. Energy in = heat in the inflowing water minus heat in the outflowing water. Energy out = energy transferred to the room. All radiators can only be 100% efficient, there simply isn't anywhere else the energy can go.


NT

On 02/03/2017 20:55, jim wrote:
"Dave Plowman (News)" Wrote in message:
In article ,
jim k wrote:
"Dave Plowman (News)" Wrote in message:
In article ,
Brian Gaff wrote:

As you said what's wanted is the heat output of the various types of rad.


Depends how hot the water circulating through them is :-P

That would be a constant if quoting the heat output for comparison
pusposes?

Oooh so temp of water is same, but different radiator designs give
off more/less heat depending on their "ability to output heat
from system water at x degree C to room air"? But you tell me
it's not called efficiency....

Correct. It is called efficacy. Wiki for light defines it better:

https://en.wikipedia.org/wiki/Luminous_efficacy

How well a particular design of radiator (which mostly works by
convection) converts warm water inside it into warm air in the room.

Oooh hang on a mo isn't that where we started?

Maybe more non-plumbers could comment & put us all right....

Basically the more surface area it has and vertical chimneys the better
it couples to the air in the room. Equally a design that has obstructed
airflow or a small surface area will perform badly.

--
Regards,
Martin Brown

In article ,
jim k wrote:
Oooh so temp of water is same, but different radiator designs give
off more/less heat depending on their "ability to output heat
from system water at x degree C to room air"? But you tell me
it's not called efficiency....

It's not. If one was more efficient than the other, where does that wasted
energy go? Into making light? Noise? Movement?

--
*Constipated People Don't Give A Crap*

Dave Plowman London SW
To e-mail, change noise into sound.

On 02/03/17 20:55, jim wrote:
Oooh so temp of water is same, but different radiator designs give
off more/less heat depending on their "ability to output heat
from system water at x degree C to room air"? But you tell me
it's not called efficiency....

Oooh hang on a mo isn't that where we started?

Maybe more non-plumbers could comment & put us all right....

Strictly its not called 'efficiency' without any qualification, no.

Its more like 'power output' than anything else. E.g a radiator might be
quoted as '1.5Kw at 60C' ...another '2.2KW at 60C' and so on.

Cramming high power output into a small space leads you to fan blown
radiators like a kickspace, or a hot air curtain.

--
Karl Marx said religion is the opium of the people.
But Marxism is the crack cocaine.

On Thursday, 2 March 2017 20:55:16 UTC, jim wrote:
"Dave Plowman (News)" Wrote in message:
In article ,
jim k wrote:
"Dave Plowman (News)" Wrote in message:
In article ,
Brian Gaff wrote:
I don't think you quite got the question or maybe you are being
diplomatically thick.

I imagine what he means is, how much does the extra surface area in
those old cast radiators get more heat into a room over the normal
ones. Obviously if they were so efficient as to make the hot water cold
no other radiator would get hot would it!

It's the wrong word to use - strictly speaking. Normally efficiency as
regards a heater would be energy in versus heat out.

As you said what's wanted is the heat output of the various types of rad.


Depends how hot the water circulating through them is :-P

That would be a constant if quoting the heat output for comparison
pusposes?


Oooh so temp of water is same, but different radiator designs give
off more/less heat depending on their "ability to output heat
from system water at x degree C to room air"? But you tell me
it's not called efficiency....


I can see you never had an education.
Any heat not emitted from the radiator is not lost, it is returned to the boiler.
Ergo all radiators are 100% efficient.

Efficiency is a very exact technical term.
https://en.wikipedia.org/wiki/Efficiency

harry Wrote in message:
On Thursday, 2 March 2017 20:55:16 UTC, jim wrote:
"Dave Plowman (News)" Wrote in message:
In article ,
jim k wrote:
"Dave Plowman (News)" Wrote in message:
In article ,
Brian Gaff wrote:
I don't think you quite got the question or maybe you are being
diplomatically thick.

I imagine what he means is, how much does the extra surface area in
those old cast radiators get more heat into a room over the normal
ones. Obviously if they were so efficient as to make the hot water cold
no other radiator would get hot would it!

It's the wrong word to use - strictly speaking. Normally efficiency as
regards a heater would be energy in versus heat out.

As you said what's wanted is the heat output of the various types of rad.


Depends how hot the water circulating through them is :-P

That would be a constant if quoting the heat output for comparison
pusposes?


Oooh so temp of water is same, but different radiator designs give
off more/less heat depending on their "ability to output heat
from system water at x degree C to room air"? But you tell me
it's not called efficiency....


I can see you never had an education.

Not in hospital sanitation no.

Any heat not emitted from the radiator is not lost, it is returned to the boiler.
Ergo all radiators are 100% efficient.

Efficiency is a very exact technical term.
https://en.wikipedia.org/wiki/Efficiency

Which profers :-

"It often specifically comprises the capability of a specific
application of effort to produce a specific outcome with a
minimum amount or quantity of waste, expense, or unnecessary
effort."

In the #real world# (TM) a more efficient radiator would shurely
heat the room with less energy wasted on pumping water round the
system, & commensurately less heat lost from pipework to & from
the boiler & rad by the unnecessary extra cycling & pumping...


" Efficiency, of course, refers to very different inputs and
outputs in different fields and industries"

Indeed ;-)

--
Jim K


----Android NewsGroup Reader----
http://usenet.sinaapp.com/

On Friday, 3 March 2017 17:55:41 UTC, jim wrote:
harry Wrote in message:
On Thursday, 2 March 2017 20:55:16 UTC, jim wrote:
"Dave Plowman (News)" Wrote in message:
In article ,
jim k wrote:
"Dave Plowman (News)" Wrote in message:
In article ,
Brian Gaff wrote:
I don't think you quite got the question or maybe you are being
diplomatically thick.

I imagine what he means is, how much does the extra surface area in
those old cast radiators get more heat into a room over the normal
ones. Obviously if they were so efficient as to make the hot water cold
no other radiator would get hot would it!

It's the wrong word to use - strictly speaking. Normally efficiency as
regards a heater would be energy in versus heat out.

As you said what's wanted is the heat output of the various types of rad.


Depends how hot the water circulating through them is :-P

That would be a constant if quoting the heat output for comparison
pusposes?


Oooh so temp of water is same, but different radiator designs give
off more/less heat depending on their "ability to output heat
from system water at x degree C to room air"? But you tell me
it's not called efficiency....


I can see you never had an education.

Not in hospital sanitation no.

Any heat not emitted from the radiator is not lost, it is returned to the boiler.
Ergo all radiators are 100% efficient.

Efficiency is a very exact technical term.
https://en.wikipedia.org/wiki/Efficiency

Which profers :-

"
It often specifically comprises the capability of a specific
application of effort to produce a specific outcome with a
minimum amount or quantity of waste, expense, or unnecessary
effort."

In the #real world# (TM) a more efficient radiator would shurely
heat the room with less energy wasted on pumping water round the
system, & commensurately less heat lost from pipework to & from
the boiler & rad by the unnecessary extra cycling & pumping...


" Efficiency, of course, refers to very different inputs and
outputs in different fields and industries"

Indeed ;-)


None of the heat is wasted.
Ergo efficiency is always 100%

harry Wrote in message:
On Friday, 3 March 2017 17:55:41 UTC, jim wrote:
harry Wrote in message:
On Thursday, 2 March 2017 20:55:16 UTC, jim wrote:
"Dave Plowman (News)" Wrote in message:
In article ,
jim k wrote:
"Dave Plowman (News)" Wrote in message:
In article ,
Brian Gaff wrote:
I don't think you quite got the question or maybe you are being
diplomatically thick.

I imagine what he means is, how much does the extra surface area in
those old cast radiators get more heat into a room over the normal
ones. Obviously if they were so efficient as to make the hot water cold
no other radiator would get hot would it!

It's the wrong word to use - strictly speaking. Normally efficiency as
regards a heater would be energy in versus heat out.

As you said what's wanted is the heat output of the various types of rad.


Depends how hot the water circulating through them is :-P

That would be a constant if quoting the heat output for comparison
pusposes?


Oooh so temp of water is same, but different radiator designs give
off more/less heat depending on their "ability to output heat
from system water at x degree C to room air"? But you tell me
it's not called efficiency....


I can see you never had an education.

Not in hospital sanitation no.

Any heat not emitted from the radiator is not lost, it is returned to the boiler.
Ergo all radiators are 100% efficient.

Efficiency is a very exact technical term.
https://en.wikipedia.org/wiki/Efficiency

Which profers :-

"
It often specifically comprises the capability of a specific
application of effort to produce a specific outcome with a
minimum amount or quantity of waste, expense, or unnecessary
effort."

In the #real world# (TM) a more efficient radiator would shurely
heat the room with less energy wasted on pumping water round the
system, & commensurately less heat lost from pipework to & from
the boiler & rad by the unnecessary extra cycling & pumping...


" Efficiency, of course, refers to very different inputs and
outputs in different fields and industries"

Indeed ;-)


None of the heat is wasted.
Ergo efficiency is always 100%


Bollox! I want to warm the room not the underdrawing to the boiler
& back....

--
Jim K


----Android NewsGroup Reader----
http://usenet.sinaapp.com/

In article ,
jim k wrote:
None of the heat is wasted.
Ergo efficiency is always 100%


Bollox! I want to warm the room not the underdrawing to the boiler
& back....

Then you must thing a rad has hot water in, room temperature water out...

--
*War does not determine who is right - only who is left.

Dave Plowman London SW
To e-mail, change noise into sound.

On Friday, 3 March 2017 17:55:41 UTC, jim wrote:
harry Wrote in message:

I can see you never had an education.

Not in hospital sanitation no.

It's thermodynamics

Any heat not emitted from the radiator is not lost, it is returned to the boiler.
Ergo all radiators are 100% efficient.

Efficiency is a very exact technical term.
https://en.wikipedia.org/wiki/Efficiency

Which profers :-

"
It often specifically comprises the capability of a specific
application of effort to produce a specific outcome with a
minimum amount or quantity of waste, expense, or unnecessary
effort."

that is not the definition of efficiency

In the #real world# (TM) a more efficient radiator

no such animal exists

would shurely
heat the room with less energy wasted on pumping water round the
system,

that isn't wasted

& commensurately less heat lost from pipework to & from
the boiler & rad

that's not lost, it's transferred to the room just the same as a radiator does

by the unnecessary extra cycling & pumping...

the system won't work without pumping. More or less all boilers won't work without cycling, though one could theoretically design one that does, at greater cost.


" Efficiency, of course, refers to very different inputs and
outputs in different fields and industries"

Indeed ;-)

And in the case of radiators, the input is heat in the water and the output to the room is heat too. There is no conversion process, no other inputs or outputs, and no loss.


NT

On Saturday, 4 March 2017 07:45:11 UTC, jim wrote:
"Dave Plowman (News)" Wrote in message:
In article ,
jim k wrote:
None of the heat is wasted.
Ergo efficiency is always 100%


Bollox! I want to warm the room not the underdrawing to the boiler
& back....

Then you must thing a rad has hot water in, room temperature water out...


Nope.
You seem to thick pipework to & from a radiator emits no heat...
Especially in draughty cellars..

You seem to be trying to tell me a length of copper pipe is as
good at heating a room as a radiator...


Exactly so.
It depends how long a piece of pipe it is.

Pipework heat is taken into the detailed heat calculations in some buildings

On Saturday, 4 March 2017 07:45:11 UTC, jim wrote:
"Dave Plowman (News)" Wrote in message:
In article ,
jim k wrote:
None of the heat is wasted.
Ergo efficiency is always 100%


Bollox! I want to warm the room not the underdrawing to the boiler
& back....

Then you must thing a rad has hot water in, room temperature water out...


Nope.
You seem to thick pipework to & from a radiator emits no heat...
Especially in draughty cellars..

You seem to be trying to tell me a length of copper pipe is as
good at heating a room as a radiator...

Dunno why you are arguing over a topic in which your knowledge is total zero.
Did you have any education at all?

"Dave Plowman (News)" Wrote in message:
In article ,
jim k wrote:
None of the heat is wasted.
Ergo efficiency is always 100%


Bollox! I want to warm the room not the underdrawing to the boiler
& back....

Then you must thing a rad has hot water in, room temperature water out...


Nope.
You seem to thick pipework to & from a radiator emits no heat...
Especially in draughty cellars..

You seem to be trying to tell me a length of copper pipe is as
good at heating a room as a radiator...

--
Jim K


----Android NewsGroup Reader----
http://usenet.sinaapp.com/

jim k Wrote in message:
"Dave Plowman (News)" Wrote in message:
In article ,
jim k wrote:
None of the heat is wasted.
Ergo efficiency is always 100%


Bollox! I want to warm the room not the underdrawing to the boiler
& back....

Then you must thing a rad has hot water in, room temperature water out...


Nope.
You seem to thick pipework to & from a radiator emits no heat...
Especially in draughty cellars..

You seem to be trying to tell me a length of copper pipe is as
good at heating a room as a radiator...


Let's just add (for the prevention of **** poor pedantry) that the
length of copper pipe is only the length between the radiator
valves.. I.e. No silly convoluted messes...

--
Jim K


----Android NewsGroup Reader----
http://usenet.sinaapp.com/