Get Steamy with the Class 5 Boiler Exam 2026 – Ignite Your Career Potential!

A domestic hot water supply boiler operating at 160 psi and 240°F is not exempt from CSD-1 requirements. CSD-1, or the Consensus Standards for Safety Controls for Automatically Fired Boilers, provides guidelines to ensure the safe operation and control of boilers.

Regardless of the pressure and temperature of the system, if the boiler's design falls under the criteria set by CSD-1, it must comply with those safety standards. This includes having proper controls and safety mechanisms in place to prevent dangerous conditions, such as pressure or temperature excursions. The boiler's operation at these specific parameters indicates it could be operating under conditions that require such safety measures, ensuring both the safety of the system and those around it.

Therefore, the statement that it is exempt from CSD-1 is false, as these boilers are still subject to safety controls and regulations to mitigate risks associated with high-pressure and high-temperature conditions.