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We have 3 big double bedrooms which has single p1 radiators of 450x2400 size each (see the attached photo). All radiators are burning hot and does not have any cold patches. A few months ago I did a chemical (fernox) flush amd system is running fine. But the problem is when we turn the heating on, our downstairs become hot so quickly but bedrooms are only warm. For example after 2 hours of heating starting from 17c, downstairs reaches 21 but upstairs is only 19. After 3 hours, downstairs reaches to 22.5 and upstairs is 20.
We do not have a cavity wall, no draughts and have recently put new loft insulation up to 270mm.
I have recently spoken to plumber who have advised me to change the radiators to type 21 500x1800 panels. He beleives that they will give more heat. He said dont pit type 22 as they are suited for downstairs, not the bedrooms. Our boiler is Glow-worm easicom 28k only 3 years old. They system is pretty clean and all radiators heat up so hot that you cant touch them and there is no air in the system, but still upstairs is cooler than downstairs.
I am really lost as what should I do? Should i change the radiators as they are not throwing enough heat out or ...?
Any advice would be appreciated!
Thanks
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