Why are air vents required?

Air vents are essential in steam systems because they prevent air from being trapped in the mains, which can hinder the efficient movement of steam throughout the system. When air is present, it occupies space that should be filled by steam, leading to ineffective heating and potential system inefficiencies. Trapped air can create barriers that impede steam flow, reducing the heat transfer effectiveness and overall performance of the heating system.

The removal of air through vents allows for a more concentrated and efficient steam distribution, ensuring that the system operates effectively and maintains the desired temperature levels. Therefore, the presence of air vents is crucial for optimal steam circulation and performance in steam heating systems.