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Doctor Evil
 
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"Christian McArdle" wrote in message
. net...
If a combi is used with a vented cylinder, then 2 zone valves are
required, one for the heating and one for the hot water, BUT what if I
want to split the downstairs heating from the upstairs heating....


The hot water cylinder forms a zone, just like a radiator zone. Each zone
needs a 2 port valve and a thermostat, whether it be a cylinder thermostat
or programmable room stat. If you had a cylinder and 2 heating zones,

you'll
need three 2 port valves. The existing pipework will determine if it is

easy
to divide into upstairs and downstairs zones.


If heating a low pressure vented cylinder, run the showers off the combi for
high pressure performance.

Is it best to use the honeywell cm67 wireless package!!!!!!


It is very well regarded, but a little ugly, and very pricey if you start
having multiple zones.

Christian.





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