"IMM" wrote in message
...

"simon beer" wrote in message
...

"IMM" wrote in message

If you do decide to stick with a vented HW system, and it certainly
does have a number of advantages,

What are they, in brief?

Consider a heat bank. Mains water pressure at the taps, so high
pressures
showers and no pump, but no high pressure cylinders. Can be DIYed.
For an explanatioin:
http://www.heatweb.com

then it is worth changing the
cylinder for a fast recovery type to improve HW reheat performance
while you are at it.

Can fast recovery cylinder only be fitted with a heat bank, not read
about
them yet. Or do they work just in cojuntion with the boiler. Any links,
names or idea of prices on the fast recovery cylinder

Heat banks can be heated direct or indirect.

A fast recovery cylinder can be open vented or to a limited degree in
unvented cylinders, the Megaflow type.

http://www.abion-online.co.uk for an explanation of fast recovery
cylinders.
using a fast recovery cylinder you can downsize the cylinder, or fit one
in
the same size effectively increase the size. Travis Perkins do the
Telford
Typhoon at 80 litres (fine for a one bathroom house) for £99 inc VAT and
125
litre version. Best to have the heating cut out cylinder stat fitted and
set to 64C when using these cylinders.

Sorry, that should be approx 44c when using an unvented and open vented
cylinder set to 55C water temp. For a heat bank at 80C, it shpould be 64C.
For a heat bank at set at 75C it should be 59C.


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