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 ...

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 zone valve setups, a separate zone valve is installed in the pipe to or from each zone. In most installations, the zone valves are in the returns, where the water is cooler. The cooler temperatures ...

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 ...