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Jack_in_VA
Premium
join:2007-11-26
North, VA
kudos:1
Reviews:
·Millenicom
reply to norbert26

Re: hydronic heat issue

If the system is zoned the zone control valves usually are located right at the boiler on a header on the hot water outlet of the boiler.

When a zone thermostat calls for heat the corresponding zone valve opens, the circulating pump starts and supplies hot water to that zone.