Illinois Home Inspector Practice Exam

What pressure range is typical for a circulated boiler?

1. 5 to 10 psi

2. 10 to 20 psi

3. 12 to 15 psi

4. 20 to 25 psi

The correct answer is: 12 to 15 psi

The typical pressure range for a circulated boiler is generally around 12 to 15 psi. This range is considered optimal for most residential heating systems. At this pressure, the system can effectively circulate water through the heating elements without excessive strain on the components. A pressure lower than this range could lead to inadequate heating since the water may not flow efficiently through the system, resulting in cold spots. Conversely, maintaining a pressure significantly higher than 15 psi can put additional stress on the boiler and connected piping, increasing the risk of leaks and potential safety hazards. This range is also aligned with the operational standards of many mechanical systems, ensuring that they work efficiently and in a safe manner. Therefore, understanding this optimal pressure helps home inspectors evaluate whether a boiler is functioning within its ideal parameters, which is crucial in determining the overall health of a heating system.