A hydronic heating system uses steam or water to distribute the heat needed to heat homes or buildings.
The most commonly used system uses water-heated up to temperatures of 200°F (93°C).
The heated water is then circulated in each room via centrifugal pumps, also referred to as circulators, which have impellers that spin and compel the water to be distributed throughout the system. The terminal units then radiate the hot water to the rooms and recycle the water through the same process. The hydronic heating system components have different crucial roles in enabling the system’s smooth operations, as steam or hot water can be extremely dangerous if not appropriately controlled. The hydronic heating system’s essential equipment is the boiler; this is the heat source used to heat the water. The boiler is automatically filled with water when the level drops. The water is then heated to a temperature of 90°F up to 200°F using gas, oil, electric furnace, or a mixture of them. If the volume of water increases due to intense heat, an expansion tank will contain the extra volume. The circulators will then circulate the heated water from the boiler to the terminals positioned in the rooms to and fro. While the air separator separates the trapped air in the piping circuit to prevent corrosion in the steel boilers or cast iron, the air vent eliminates the air from your heating system by automatically opening and closing when necessary. The hydronic heating system also has safety components that ensure that it is effectively regulated. The high limit control is designed to cut off the HVAC system’s power to the boiler if the temperature rises too high. Contrary to the low water cutoff valve, which cuts the boiler’s power in case the level of water drops, the pressure reducing valve or water regulating valve automatically adds water into your heating system if inaccurate pressure is detected. The pressure relief valve discharges extra water when expansion creates pressure.