New York Low Pressure Boiler COF Practice

How many expansion tanks are required for a system with 6 boilers?

1. 0

2. 1

3. 2

4. 3

The correct answer is: 1

In a hydronic heating system, an expansion tank is crucial for accommodating the increase in water volume caused by thermal expansion as the system heats up. The general guideline is that one expansion tank can typically serve multiple boilers, provided they are within a reasonable capacity limit and connected to the same system. For a system with 6 boilers, having a single expansion tank is generally sufficient unless specific circumstances require additional capacity due to unique engineering designs, excessive volumes of water, or other regulatory requirements. The rationale behind this is that the single expansion tank can effectively manage the pressure changes and volume fluctuations of the entire system, thus making it both a practical and economical choice. If more than one expansion tank were to be used, it could lead to unnecessary complexity in the system design and operations. Therefore, having one expansion tank is typically recommended for systems of this scale. This capacity assumption aligns with standard practices in hydronic heating applications, making option B the most appropriate choice.