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New boiler question

Ultra2424 Member Posts: 3
We had a new high efficiency combi-boiler installed, an NTI TRX 150C. It's for radiant floor heat and DHW using natural gas. Does the boiler turn on ONLY when there is a call for either DHW or radiant heat?

So far we love the boiler and it's efficiency. Also this forum is by FAR the most helpful and courteous people of any forum/website I've ever been on. Thank you!