What is the function of an air separator in a heating system?

The function of an air separator in a heating system is to remove air bubbles from the fluid. When water is heated, it can dissolve air that, once the water cools, may come out of solution and form bubbles. These bubbles can create problems like noise in the system, reduced efficiency, and potential damage to components due to steam or cavitation. By effectively removing air bubbles through the air separator, the system operates more smoothly and efficiently, ensuring optimal performance and preventing potential issues related to trapped air. This is why the correct answer is focused on the removal of air bubbles from the fluid.