What is the common high temperature limit setting for a hot water boiler?

The common high temperature limit setting for a hot water boiler is often set at 210°F. This setting is crucial for the safe and efficient operation of the system. The high limit control plays a vital role in preventing overheating, which can lead to pressure build-up and potential hazards.

Setting the limit at 210°F allows the boiler to operate efficiently while providing sufficient heat for domestic hot water needs and various heating applications. It also ensures that if the water reaches this temperature, the system will automatically shut down or limit further heating to avoid any unsafe conditions.

Lower temperature settings, such as 150°F or 170°F, might not provide adequate heating for certain applications, while a setting of 190°F, while common in some systems, can lead to inefficiencies and might not offer the same level of safety against overheating that the 210°F setting does. Thus, the standard high temperature limit of 210°F strikes a balance between efficiency, safety, and system performance.