Which of the following choices is an appropriate method for ensuring efficient operation of the hot water system?

Routine maintenance checks are essential for ensuring the efficient operation of a hot water system. This practice involves regular inspections and servicing, which can help identify potential issues before they become significant problems. Maintenance may include checking for leaks, verifying proper insulation, flushing the tank to remove sediment buildup, and ensuring that the system is operating at optimal efficiency.

By investing time in routine maintenance, technicians can prolong the lifespan of the hot water system, maintain high energy efficiency, and ensure safety compliance. This proactive approach also allows for adjustments to be made based on the system's performance, thus keeping the hot water system running smoothly and efficiently over time.