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RAD sizing for house renov project

david4791 · 2011-08-08 10:23:40

Hello, I wish to renovate a house which has an existing horiz convector rad, albeit a dated model. I was considering a nice funky tower rad from B&Q which has a BTU output of 4764 units. Another company stated I need a rad with a BTU output of 12000 units. The size of the room is 5m x 5m = 25m2. Any advice out there?

08-08-2011 10:23am

#1

david4791

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Hello,
I wish to renovate a house which has an existing horiz convector rad, albeit a dated model. I was considering a nice funky tower rad from B&Q which has a BTU output of 4764 units. Another company stated I need a rad with a BTU output of 12000 units. The size of the room is 5m x 5m = 25m2. Any advice out there?

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#2 08-08-2011 5:27pm

DoneDL

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There are plenty of free radiator sizing sites online, 12000 btus seems excessive to me for a room that size but if that is what is required then the renovation will require an overhaul of the insulation.

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#3 08-08-2011 7:35pm

david4791

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Thanks for the advice, I have tried some of those websites they all advise on circa 12000 btu output rad

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#4 08-08-2011 7:51pm

Dardania

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Personally, I think it's better to oversize than undersize, so that you have the option of running a condensing boiler in future

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#5 08-08-2011 8:17pm

david4791

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True Dardania

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#6 09-08-2011 1:50pm

DoneDL

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david4791, if your happy with that load then I would suggest at least two radiators positioned to eliminate cold spots.

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#7 09-08-2011 2:32pm

david4791

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I will run with that.

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