What does ASHRAE 55 reference?

ASHRAE 55 specifically addresses the criteria for acceptable thermal environmental conditions for human occupancy, which makes it a vital reference for understanding and evaluating thermal comfort. This standard outlines the factors that contribute to thermal comfort, such as air temperature, humidity, air movement, and clothing insulation.

Thermal comfort is essential for ensuring occupants feel comfortable in indoor environments, which is crucial for productivity, health, and overall well-being. Using guidelines from ASHRAE 55 can help professionals create spaces that maintain appropriate temperatures and humidity levels that support comfort for a diverse range of occupants.

Though other options relate to important aspects of building design and operation, they do not specifically focus on thermal comfort as ASHRAE 55 does, which is why the correct choice centers on this standard's emphasis on creating a comfortable thermal environment.