Radiators: does size matter?


18 Apr 2009
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United Kingdom
I’m adding a radiator to the last one on the system. Room apparently needs 7261 BTU (according to an online calculator)

First question: is it OK to put in bigger rads than might be strictly required?

I could put in a 600x1600 Type 21 (7330 BTU) or a 600x1400 Type 22 (8165 BTU)
However those lengths would require being positioned
under a single-glazed kitchen window, and there’d be a wooden settle in front (but pulled forward a few inches).
Alternatively I could fit two smaller rads on either side of the window and settle: found some cheap ones on Screwfix that together would deliver 10,812 BTU.
They’d actually be cheaper than putting either of the other two under the window as from their Kudox Premium range. (Are they any good?)

Comments welcome!
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No problem putting bigger radiators in. It means it heats up quicker assuming your boiler can deliver the heat.

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