On Mon, 14 Jan 2008 14:13:01 GMT, Roger
wrote:

The message
from Sam contains these words:

The radiators in the house are old, single, without fins, and painted
over. Heat outputs unknown.

Stelrad single panel?

23" high.

88" long 5921 Btus/hour.
82" 5498
76" 5075
69" 4652
63" 4229
57" 3808
50" 3384
44" 2961

Sorry I haven't replied to this thread for a while, I shall try to do
so today or tomorrow. In the meantime can I ask one quick question:

Do I need 28mm pipe for central heating/hot water if the system is
pumped? Is it that 28mm is only for gravity fed systems? If there is a
pump in place, does 28mm offer any advantage over 22mm?

Thanks.