Recently I wrote in this column that every component in a controls circuit is a power supply, a switch or a load — no other possibilities. And that means that every control, hydronic or otherwise, is ...

Are you or someone you work with a bit confused about all the hydronic controls available — thermostats, controllers, circulators, zone valves, zoning panels, outdoor reset, energy-saving pumps, snow ...

In hydronic heating, to control where heated water goes to various sections of a building, the system might rely on two or more zone valves. A zone valve opens or closes based on demand from a ...