CH Radiator sizing

The radiator manufacturers have software that will do a reasonable job for you, Jimmy.

I've found the Myson one the best, but it's not on their web site right now. Is your email address correct? If so, I'll send you a copy.

Basically, you have to go round and measure each surface and feed the numbers in. It will calculate the heat loss for the room and you go from there.

.andy

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Any chance of emailing me a copy

Thanks Paul.

Years ago, Stelrad gave away a free program (MS-DOS based) that calculated your heat loss, and told you the BTU each room required, as well as offering boilers to suit.

I just had a quick look on the web, and they are charging £20 for it on CD at the moment.

I also remember at our local Plumb Centre they had a cardboard wheel calculaty thingy for calculating radiator sizes. I am sure the nice man at your plumb centre or other supplier would let you use theirs if you were buying from him.

I might have a copy of the old Stelrad program lurking in an old box of disks somewhere...

You could also have a search on the web for "heat loss calculation program". There are a few expensive programs that have free demos available. If they are limited to 1 use, or 30 days, it would be ideal for you.

Bob

My email is correct so you can email me a copy.

Many thanks - I kne someone would be able top help

Jimmy

Sorry, replied to wrong message and forgot to change email addr.

My email is corrct so you can send a copy by email.

Thanks very much.

Jimmy

answers :-(

.andy

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On its way, and to Paul

.andy

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If your old radiators provide sufficient heat, replace them with new ones of similar output. I was once given rule-of-thumb estimates for old steel panel designs (unfinned) of 400btu/ft2 for singles and 600btu/ft2 for doubles. These rough estimates were at a temperature difference of 100F. Conversion to kW, m2 and deltaC left as an exercise for the reader.

Note that if you intend to fit a condensing boiler, you should base any calculations on cooler water temperatures. I forget the exact figure that is used, but it shouldn't be too hard to find. (It might be 70C against

Oh yes indeedy! :((

In message , EricP writes

too high, too low or just crap ?

The latter two. Couldn't make up my mind between them.

Fortunately I didn't go out to buy on the strength of it. :)

Thanks to everyone for the useful links,info and software(Andy)

Jimmy

Dave, I've replied to your email with the Myson attachement as a ZIP.

.andy

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| >Thanks very much. | >

| >Jimmy | | | On its way, and to Paul | Any chance someone could forward a copy to me too? I've been using the web based calculator on the B&Q website for rough sizings but have no way of telling how accurate the results actually are.

E-Mail address is: seri (at) dextrous (dot) net (I hope that doesn't open the floodgates of spam)

Many many thanks in advance

Seri

In the post, although what Hotmail will do to it is another matter!