What is the measure used to determine the flexibility of a boiler's operation?

The measure used to determine the flexibility of a boiler's operation is the turn down ratio. This ratio indicates the range over which a boiler can modulate its output, essentially reflecting how well it can adjust to changes in demand without compromising performance or efficiency.

A higher turn down ratio means a boiler can operate effectively at a lower output compared to its maximum capacity, which is particularly important in applications where demand can fluctuate significantly. This flexibility allows the boiler to maintain optimal efficiency and performance while adapting to varying load conditions, making it a crucial factor in evaluating a boiler's operational capability. Therefore, the turn down ratio is a key specification for assessing how well a boiler can respond to changes in steam or hot water requirements.