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Unit #7 Hydronics 1-2

Horizontales
The most commonly used changeover method using two three-way valves connected to the terminal unit or zone piping on a four-pipe system.
A piping system in which a single main line serves as the hot supply and hot return piping to and from the heat source.
Thermometers that measure temperature by detecting the infrared energy emitted by substances that have a temperature above absolute zero, -460°F (-273°C).
Verticales
A hydronic system that has separate mains for the supply and return HTF.
Silent, efficient, nonelectric control valves that provide reliable temperature control for hydronic terminal units.
A hydronic heating and cooling system consisting of a hot supply main, a chilled supply main, and a common return main.