Surrey Dave
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| posted on 19/11/06 at 10:37 PM |
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Central Heating Radiator Sizes
Have been working out some sizes for my house using different calculators /formulae.
There is a vast range in the results which bothers me.
Example
Lounge - no double glazing - one outside wall
size L 5.36 W 4.7 H 2.4 mtrs
Results in BTU's are:
1) 9432
2) 11016
3) 11185
4) 8400 - 10075
5) 8948
Can someone give me a clue?
Thanks
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Deckman001
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| posted on 19/11/06 at 10:54 PM |
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No idea on rad sizes matey, but these people are very cheap for systems and rads
http://www.mrcentralheating.com/
Good luck
Jason
[Edited on 19/11/06 by Deckman001]
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JackNco
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| posted on 20/11/06 at 12:15 AM |
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nip in to B&Q and grab one of there radiator booklets, there free and theres a guide in the back to the size of rad u need in comparison to the
room
John
Some people are worried about the difference between right and wrong. I'm worried about the difference between wrong and fun.
O'Rourke, P.J. (1989), Holidays in hell. London (Picador)
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JoelP
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| posted on 20/11/06 at 07:24 AM |
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thats not much variation considering how unexact a science it is, picking a radiator. Remember, you can always turn it down! So id just pick the
biggest, and make it a double convector to keep the width down. 
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fesycresy
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| posted on 20/11/06 at 09:23 AM |
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Although I'm not a domestic plumber, for commercial premises we work out rads at 5Btu / cubic feet. New builds obviously less, depending on the
u value of the building.
I would always suggest going slightly over as the rads are tested in ideal conditions ie top and bottom connection not both bottom. And as said, you
can always turn them down.
-----------------------------------------------------------------------------------------------------
The sooner you fall behind, the more time you'll have to catch up.
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Danozeman
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| posted on 20/11/06 at 04:50 PM |
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I agree with Joel. Those double rads are excellent.
Dan
Built the purple peril!! Let the modifications begin!!
http://www.eastangliankitcars.co.uk
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alfasudsprint
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| posted on 20/11/06 at 06:24 PM |
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Where did you get the formulae? You should be taking into account wall construction, floor and ceiling/ roof construction, windows, doors, orientation
etc etc. Try plumb center website, dont worry too much about variance, look at actual rad size to satisfy your btu's, go slightly on the higher
side as already posted. Good luck mate!
Tim
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