Sorry to complicate things but....
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....
Can this be done, the only problem is the heating in the house is existing on a semi gravity system.
Is it best to use the honeywell cm67 wireless package!!!!!!
cheers guys
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