What is the purpose of an air separator in hydronic systems?

• A. To increase water flow rates
• B. To remove trapped air from the system
• C. To cool the water returning to the boiler
• D. To control pressure levels

Answer: (B)

The purpose of an air separator in hydronic systems is to remove trapped air from the system. Trapped air can cause a variety of issues, including reduced efficiency, noise, and even damage to the system components. When air accumulates in the system, it can disrupt the flow of water and lead to corrosion or overheating of the boiler. An air separator effectively uses gravity and design principles to gather and expel the trapped air, allowing for a more efficient and reliable operation of the hydronic heating system. By ensuring that the system is free of air pockets, the air separator helps maintain optimal water flow and thermal transfer throughout the system, enhancing performance and longevity.