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    External automatic bypass valve on bolier with internal bypass valve.

    The manual for a a Worcester Greenstar 24i System ErP says: "The appliance is equipped with an internal by-pass. The internal bypass is not intended to be a substitute for an external system bypass. An external automatic bypass should be used if the system flow can be significantly adjusted or...
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    Central control of multi-zone CH with Honeywell hcc80

    Am planning a zoned CH system with 7 zones + conventional gas boiler + conventional HW tank, with central control of the zones. My ideal would be a self contained box that does everything with an ethernet port onto a local area network so I can control it from my laptop but that just doesn't...
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