Which pilot is most often used on small boilers?

The pilot most often used on small boilers is continuous. A continuous pilot light remains lit at all times, providing a constant source of ignition for the burner. This is particularly beneficial in small boiler applications as it ensures that the boiler can respond immediately to demand for heat without the delay associated with reigniting a pilot light.

Having a continuous pilot also simplifies the operation of the boiler since it eliminates the need for a more complex ignition system. It provides reliability and consistency in performance, which are critical for maintaining the efficiency of heating systems in small-scale applications. Continuous pilots are favored in situations where steady operation is desired and where the cost of operating a small flame is acceptable compared to the potential delays and complications of intermittent or other types of pilot lights.

In contrast, other types of pilots like automatic, interrupted, or intermittent may be used in larger or more complex systems where the efficiency of gas usage and system design allows for such configurations. However, for small boilers, the continuous pilot is recognized for its simplicity and reliability in providing ignition without unnecessary complications.