Working out radiator requirements

[Winnet]

I am busy combining the dining room and kitchen and trying to work out what radiators I need. I have tried 3 different online BTI calculators and they all come up with different answers. Looking at the existing radiators I also get different answers for what they output.

Does anyone know a trustworthy source of info?

G

 

[ElThomsono]

Are you getting vastly different figures? One thing to consider is how the rest of the house is set up, if all the other radiators are oversize by 50% then you need to match that or you'll have one room that doesn't fully heat up before the thermostat trips out.

Edit: for radiator output I just use the Screwfix website, find one of the same size and use the figures they provide, they're all much of a muchness.

 

[Winnet]

It ranges from 11670 BTU to 6796 BTU, a couple are around 9500 BTU. Some take into account the walls, windows and existing insulation but don't appear consistent.

Good call on Screwfix, I can check that out.

Calculations attached for reference.

G

 

[Andylaser]

I found this place to be good and had a great selection. The double thickness radiators chuck out a lot more heat. Also black & grey radiators emit more heat than white ones. Scientific fact.

 

[Winnet]

I found this place to be good and had a great selection. The double thick radiators chuck out a lot more heat. Also black & grey radiators emit more heat than white ones. Scientific fact.

Which place?

G

 

[MaC]

See if you're doing the floor anyway ? could you not just fit underfloor heating and solve the problem ?
Clear the walls, no dusty radiators, just gentle warmth slowly rising

Our last house had underfloor central heating; I wish this one did.

 

[Winnet]

That is a good point Mac.

G

 

[noddy]

Yes, lift the whole house up and put in a hypocaust

 

[MaC]

Yes, lift the whole house up and put in a hypocaust

About £30 a square metre for the piping, etc., it is very tempting.

Underfloor Heating Floor Types | Polypipe Underfloor Heating

Underfloor heating systems suitable for a range of floor types including in the floor, over the floor & between the joists products.

www.polypipeufh.com

 

[Andylaser]

Which place?

G

Oops.

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