The turndown ratio in boiler heating systems refers to the boiler’s ability to operate efficiently at lower output levels relative to its maximum capacity. Essentially, it measures the range between a boiler’s highest and lowest firing rates. For instance, if a boiler has a turndown ratio of 15:1, it means the boiler can reduce its heat output to one-fifteenth (or less than 7%) of its full capacity.

A higher turndown ratio offers significant benefits, enhancing comfort, flexibility, and energy efficiency in home heating systems. With a greater turndown ratio, a boiler can:

• Better match the home’s heat demand
• Maximise energy efficiency
• Reduce frequent on/off cycling, which wastes energy and increases wear and tear
• Operate at lower firing rates during periods of lower heat demand (such as mild weather)

The turndown ratio is a key factor in optimising a boiler’s efficiency, performance, and responsiveness to varying heating needs.

Navien residential boilers boast an impressive 15:1 turndown ratio, offering more precise control and energy savings. In contrast, traditional boilers typically have a turndown ratio of only 4:1 to 6:1, making Navien boilers a superior choice for those seeking advanced heating performance.

Contact Ray Mckenna for heating information or gas services in Warrington. Gas Safe Registered Engineers should always be used when Gas Servicing and Installations are required.