ASHRAE standard 15 - 2013 requires the use of room sensors and alarms to detect refrigerant leaks of

• A. All safety groups
• B. Only safety Group A
• C. Only safety Group B
• D. None

Answer: (A)

Leak detection in ASHRAE 15 is intended to protect occupants by providing immediate warning of any refrigerant release, regardless of how the refrigerant is classified. The standard uses Safety Groups to categorize refrigerants by toxicity and fire hazard, but the requirement for room sensors and alarms covers refrigerants across all groups within the standard’s scope. This universal approach ensures that a leak is detected quickly in any space where refrigerants are used, because even low-toxicity refrigerants can pose risks at higher concentrations and higher-toxicity refrigerants can be life-threatening. Having sensors and alarms for all safety groups closes any gaps in detection and supports prompt evacuation, shutdown, or mitigation as needed.