What is the function of a water leg on a boiler?

The function of a water leg on a boiler is indeed to absorb heat that would otherwise be wasted. In many boiler designs, the water leg is an integral component that helps to maintain the efficiency of the system by capturing and utilizing excess heat generated during the combustion process. By doing so, it enhances the overall thermal efficiency of the boiler, allowing more heat to be transferred to the water in the boiler, which is then converted into steam for energy generation or heating purposes.

The water leg also plays a crucial role in ensuring that the boiler operates within optimal temperature ranges, helping to reduce heat loss and improve fuel efficiency. While other elements of a boiler can provide structural support, regulate flow, or function in safety capacities, the primary goal of the water leg is to optimize the heat absorption process and improve the boiler's operational efficiency.