On 29 Dec 2005 09:46:25 -0800, "htmark98"
wrote:

Many thanks Andy, Gonna work all that out later.

One of our radiators in the bedroom is already making a 'banging' noise
so i think that may be a sign that there are too many rads on the run
already.

Does it have a thermostatic valve? If so, it might be fitted the
wrong way round.

It terms of BTU i've worked it out (approx) to be

Rad 1 (600x1600) 6145
Rad 2 same 6145
Rad 3 same 6145
Rad 4 (500x1000) 3275

Total BTU 21,710 off one run going left now the 22mm goes into another
run (so only 1 pipe really)

I will do the sums later and work it out right.

It's best to stick to one unit of measure if you're doing the sums.
When something is out by a factor of 10 it's usually obvious, but so
many of the conversions between imperial and metric are 3s and 4s and
it's easy to go wrong.

For the above you can divide BTU/hr by 3412 to get kW, so 6.4kW for
the 21710. That's about the limit.





--

..andy