According to ASHRAE Standard 15-1994, which requirement must be met regarding refrigeration leaks?

The requirement regarding refrigeration leaks according to ASHRAE Standard 15-1994 emphasizes the use of room sensors and alarms. This standard focuses on ensuring safety in areas where refrigerants are used by implementing measures that can detect leaks in real-time. Room sensors continuously monitor the concentration of refrigerants and are designed to activate alarms if levels reach a predetermined threshold, which helps prevent hazardous situations and ensures the safety of personnel in the vicinity.

While the other options might contribute to leak detection and prevention strategies, they do not address the direct and proactive surveillance of refrigerant concentrations in the air. Mechanical seals can prevent leaks, visual inspections can catch obvious issues, and annual maintenance checks can help maintain equipment integrity; however, the combination of sensors and alarms is essential for immediate detection and response to leaks, ensuring a safer working environment in refrigeration facilities.