What is the indication of a well-functioning venturi in a gas appliance?

A well-functioning venturi in a gas appliance is characterized by its ability to effectively mix air with gas for combustion. The venturi principle relies on the differential pressure created as gas flows through a constricted area, which draws in surrounding air and allows for an optimal air-to-gas ratio. This mixing is crucial because it ensures that the gas burns efficiently and cleanly, providing a stable flame and maximizing the appliance's operational effectiveness.

When the venturi is functioning properly, it leads to consistent combustion and optimal performance of the appliance. The ability to mix air and gas properly directly influences the efficiency and safety of the gas appliance in operation.