Final answer:
ASHRAE Standard 15-2013 requires the use of room sensors and alarms to detect excessive levels of refrigerants in occupied spaces, alerting individuals to potential leaks that may result in health and safety risks.
Step-by-step explanation:
The question pertains to ASHRAE Standard 15-2013, which is a guideline related to the safety of refrigeration systems. This standard requires the use of room sensors and alarms to detect excessive levels of refrigerants that can pose health and safety risks if they leak into occupied spaces. The purpose of these sensors and alarms is to ensure that anyone present in the area can be alerted to the presence of refrigerant leaks and take appropriate action to evacuate and address the issue. Refrigerant leaks are a serious concern because many refrigerants can displace oxygen or become toxic at high concentrations, posing both an asphyxiation and poisoning hazard to individuals.