Radiator size to window size question

[Touran Daddy]

Hello guys,

just thinking, which is probably dangerous for me and couldn't see any relevant answer to my question so here goes.

once the required heat output of the radiator is known and not worrying about how the radiator looks, would it be better to have a radiator that spans most of the window meaning most of the cold air is pushed up and heated over a smaller one in the middle perhaps allowing the cold air from the sides drop down?

as I said, probably thinking too much.

cheers

 

[lame plumber]

if its bigger, just brings room uptgo temp quicker and looks better to the eye

 

[Touran Daddy]

That's what I thought about perspective. A long thin rad in proportion to the room/window rather than a small clumpy one in the middle.

im obviously not including designer rads etc in funny places just the bog standard under the window whites.

 

[AWheating]

stop thinking. 🙂

 

[Chalked]

Over sized rads are good for condensing boilers.

 

[Touran Daddy]

stop thinking. 🙂

Aye, more drinking.

 

[Worcester]

Over sized rads are good for condensing boilers.

Says who?

 

[Ermintrude]

Laws of thermodynamics? Lower flow req due to less requirement to force heat through small surface area. Thus lower return temp therefore better delta T in burner and more latent heat transferred to heating fluid from water vapour in poc? Always tell custards to run boilers at 63c or lower.

 

[efficiencyman]

Over sized rads are good for condensing boilers.

Over sized rads are even better if you wish to operate heat pumps GS or ASHP, mine works great & cut my Gas consumption by 80% ( even with ASHP )

 

[Chalked]

Says who?

Just me probably .
Larger radiator can give out the same heat to the room as a smaller one, but at a lower temperature. Therefore boiler temp can be lower.

 

[Roger Welton]

I'm sure this discussion has been had before, we all refer to them as oversized, but certain folk (correctly but slightly pedantically) insist that they aren't oversized but are correctly sized with a different delta T in mind.

 

[Worcester]

Laws of thermodynamics? Lower flow req due to less requirement to force heat through small surface area. Thus lower return temp therefore better delta T in burner and more latent heat transferred to heating fluid from water vapour in poc? Always tell custards to run boilers at 63c or lower.

I understand that 🙂

My comments was to trigger the point that ONE oversized rad doesn't help. and could actually end up messing the whole system up, unless properly balanced.

Shoving one big rad in without the other considerations, could just end up with an overheated room and wasting energy. (Too much hot air 🙂 )

 

[jase158]

if the planet was cube shaped would there be more wars? what would happen if aliens attacked?

 

[Ermintrude]

Be some continents we would struggle to live on as g would be massive like playing footy at 20,000ft. Defo more wars. When aliens attack planet would turn into Rubik's cube. Aliens play for ten mins then forget about earth for 25 years.

 

[happyflyer]

I understand that 🙂

My comments was to trigger the point that ONE oversized rad doesn't help. and could actually end up messing the whole system up, unless properly balanced.

Shoving one big rad in without the other considerations, could just end up with an overheated room and wasting energy. (Too much hot air 🙂 )

Absolutely on the ball this man, he is looking at the bigger picture, as one should do, I have read a lot of Worcester posts and is is no duck egg, if you listen to him you will not go far wrong, he spotted the deliberate mistake a mile away, good on you Worcester.

Worcester, balanced and controlled I know that's what you meant anyway, it may not be a new build and be a retrofit


Tony

There are enough rad sizes around to make it look good and still keep to the heat loss calculations, change to single etc this is a plumbing forum and plumbers work to the nearest brick, not an architectural forum

 

[happyflyer]

Be some continents we would struggle to live on as g would be massive like playing footy at 20,000ft. Defo more wars. When aliens attack planet would turn into Rubik's cube. Aliens play for ten mins then forget about earth for 25 years.

Ermi,

Can you translate, I got all my qualifications back in the 70s

 

[Ermintrude]

If cube there would be corners which would be equivalent of mt Everest. As land suitable for habitation would be lower then yes more wars and if the aliens would attack earth word transform into Rubik's cube

 

[Ermintrude]

Absolutely on the ball this man, he is looking at the bigger picture, as one should do, I have read a lot of Worcester posts and is is no duck egg, if you listen to him you will not go far wrong, he spotted the deliberate mistake a mile away, good on you Worcester.

Worcester, balanced and controlled I know that's what you meant anyway, it may not be a new build and be a retrofit


Tony

But that's also assuming that the rad is on a whole house system and not on a trv or an individual interlock type setup as per other recent threads.

If the stat was in that room it would possibly mean energy was saved..... Room reaches set point faster than all others due to 'oversize' and therefore stat satisfied and switches off boiler, other rooms don't hit temp but 7c lower due to longer heating up time = less energy used?

 

[happyflyer]

Ermi,

I think we should all install systems like yours at home, then there would be a World shortage of steel, copper and plastic...:wub:

I think Woreceter was more a word of warning

 

[Ermintrude]

I know. Playing devils advocate. It's getting more and more common . John guest UFH manifolds can be used to do same job with actuators and stats. I however think that copper and a few Honeywell 2 ports is going to be much easier to fix as parts will almost always be available.

 

[happyflyer]

I know. Playing devils advocate. It's getting more and more common . John guest UFH manifolds can be used to do same job with actuators and stats. I however think that copper and a few Honeywell 2 ports is going to be much easier to fix as parts will almost always be available.

Ermi,

I could not agree more about not using bespoke manifolds, I would have got a short piece of 28mm copper drilled 6 holes to take 15 mm and brazed them
up with Rothenburg rods, and maybe used a 24VAC valves, but you have ones with manual action too, good choice, just take up a lot of space, but will still function 100%

Your comment about spares is spot on too, two ports a bit costly???