New radiators falling off - what would you do?
Discussion
shady lee said:
Just further to add, why didn't you go for convector radiators?
Those panel ones are terribly crap at heating a house fast lol
Just realised that’s what’s in my kitchen. Previous owner fitted them, I call the fashion radiators as they look nice but don’t work all that wellThose panel ones are terribly crap at heating a house fast lol
If you like living dangerously, there is a technique for dropping the radiators without draining the system down.
One of the cowboys I've employed in the past used it, and it was successful - basically loosen off the valves either end and orientate from vertical to horizontal onto timber/books. Nip up the valves, do your thing & reverse. EDIT, it does depend on having appropriate fittings and help to manage the weight.
One of the cowboys I've employed in the past used it, and it was successful - basically loosen off the valves either end and orientate from vertical to horizontal onto timber/books. Nip up the valves, do your thing & reverse. EDIT, it does depend on having appropriate fittings and help to manage the weight.
Edited by Chris Type R on Tuesday 17th December 14:32
Marcellus said:
The Output from them is; 6,204 BTU's (1,818 Watts) what would the output from a convection radiator 470mm wide be?
You can get about 900W off a 500x600mm convector vs what I assume is a 470x2000mm panel?It's half the output, but then it's a third of the size, so hardly surprising it's less. You do get more heat for a given size from a convector, but they're long rather than tall which isn't always convenient.
Marcellus said:
shady lee said:
Just further to add, why didn't you go for convector radiators?
Those panel ones are terribly crap at heating a house fast lol
The Output from them is; 6,204 BTU's (1,818 Watts) what would the output from a convection radiator 470mm wide be?Those panel ones are terribly crap at heating a house fast lol
Radiation is roughly 20(ISH) % of heating efficiency compared to 80% convection.
I think the point I'm trying to make is convection moves hot air and changes the ambient far faster than radiation does.
Edited by shady lee on Tuesday 17th December 21:13
shady lee said:
Try not to think about BTUs in this instance, I'm taking about speed of heating.
Radiation is roughly 20(ISH) % of heating efficiency compared to 80% convection.
I think the point I'm trying to make is convection moves hot air and changes the ambient far faster than radiation does.
Panel radiators mostly use convection to heat the room. Radiation is roughly 20(ISH) % of heating efficiency compared to 80% convection.
I think the point I'm trying to make is convection moves hot air and changes the ambient far faster than radiation does.
Edited by shady lee on Tuesday 17th December 21:13
shady lee said:
Without convector fins like the one pictured?
Yes. Do you think sticking a load of hot tubing in a room isn't going to cause convection? The only largely radiative heaters are the type with hot glowing electric elements.shady lee said:
It's hardly going to be in the same range as dedicated convector panels.
As mentioned above, based on specs they're about 2/3 as effective as a finned convector.Flibble said:
As mentioned above, based on specs they're about 2/3 as effective as a finned convector.
righto, I had information it was lower, either way the performance is still a poor show in comparison, especially if you have a older property without decent insulation levels and require a fast heat up from set back temps.Edited by shady lee on Wednesday 18th December 15:21
Edited by shady lee on Wednesday 18th December 16:40
Heat transfer is largely by convection, which is largely drive by surface area, and fins are a cheap light weight way to achieve that. However a nest of pipes works too.
The rate of heat transfer is rated in Watts or BTU, so if th output is compatible the rate it heats a room should be to. You can get calculator the the output needed for a given room, based on size wall/ceiling type and amount of windows.
Only complication is the output us for a given water temperature and delta t temp drop, ie, upsize for lower flow temps, and some companies use different temps for the quoted output, all usually higher than sensible for condensating boilers.
However unless the OP has issues with performance or is planning to change the rads that's all by the by. Most Plumbers turn the flow temp to max in their way out, ensuring good performance but higher energy costs.
Daniel
The rate of heat transfer is rated in Watts or BTU, so if th output is compatible the rate it heats a room should be to. You can get calculator the the output needed for a given room, based on size wall/ceiling type and amount of windows.
Only complication is the output us for a given water temperature and delta t temp drop, ie, upsize for lower flow temps, and some companies use different temps for the quoted output, all usually higher than sensible for condensating boilers.
However unless the OP has issues with performance or is planning to change the rads that's all by the by. Most Plumbers turn the flow temp to max in their way out, ensuring good performance but higher energy costs.
Daniel
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