True or False? Copper water-tubed hydronic boilers have the lowest terminal mass per BTU/HR.

Copper water-tubed hydronic boilers are known for their efficient heat transfer capabilities due to the high thermal conductivity of copper. This characteristic allows them to achieve a higher output of heat with a lower mass compared to other materials like steel. When we talk about terminal mass in relation to BTU/HR output, it refers to the amount of physical mass of the boiler required to produce a certain amount of energy over time.

Because of copper's excellent conductivity, these boilers can utilize less material while still delivering high performance, effectively resulting in a lower terminal mass per BTU/HR. Therefore, stating that copper water-tubed hydronic boilers have the lowest terminal mass per BTU/HR aligns with their known efficiency and design advantages in hot water production.