On Wed, 04 Jan 2006 23:14:20 +0000, Andrew Gabriel wrote:

In article ,
John Stumbles writes:

Incidentally where several rads have been trung together I've sometimes
seen them connected at both top and bottom ports. Anyone got any theories
on why this is done?

Works as one large radiator. That's how each section in
a single radiator is connected to the next, after all.

Well I suppose that gets to the point, though it doesn't really answer my
question. A single long rad with flow at one end and return at the other
will surely exhibit a similar temperature difference along its length (I
must test this when I get the 21374 I've just ordered from Toolstation :-))

However I can't see that joining multiple rads at top and bottom would
significantly change the heat distribution compared to connecting them
only at the bottoms (or, for that matter, at the tops).