IMM wrote:
=

"Jonathan" wrote in message
...
Hi All,

Just reading the FAQ on central heating at
http://www.cucumber.demon.co.uk/diy_test/Q2.12.html

It says "After installation and commissioning, a new central heating
system
should be balanced." And says: The "...aim of balancing is to achiev=
e the
correct temperature drop across the boiler flow & return pipes (11=B0=
C)."

I assume that in layman's terms this means, "... so that the water th=
at
goes
back to the boiler is cold enough to need re-heating, yet warm enough=
to
have delivered sufficient heat to the last radiator in the chain? Is =
that
right?

Sorry if this is a stupid question...

Jonathan
=

Install a micro-bore system with manifolds. They are self balancing if=
the
rads are sized reasonably correct. Then install an auto variable speed=

Grundfos Alpha pump.
=

Haven't we been here before? =

ISTR that we had a discussion about this and noted that microbore
systems might be a bit less unbalanced at the outset but that was about
all. =



-- =

Ed Sirett - Property maintainer and registered gas fitter.
The FAQ for uk.diy is at www.diyfaq.org.uk
Gas fitting FAQ http://www.makewrite.demon.co.uk/GasFitting.html
Sealed CH FAQ http://www.makewrite.demon.co.uk/SealedCH.html