"David Hansen" wrote in message
...
On Sun, 19 Feb 2006 11:38:07 -0000 someone who may be "Doctor
Drivel" wrote this:-

If gaining space is the aim then put the combi or water store. when
convenient and install a DHW secondary circulation loop.

Provided one is prepared to put up with the standing losses over a
decade or two. When these are pointed out some decide that saving a
bit more space isn't as great a priority as they thought it was.

IFAIAC, 'all' DHW draw-off pipes should be lagged. An insulated secondary
loop will not loose too much heat and with a pipe state the pumps will only
come on when the loop has cooled. With a secondary circulation loop you
waste far less water keeping water bills down. Water flow at each tap can be
throttled back as hot water is instantly available at the tap. People will
accept low flows as long as there is instant water at the taps.