Question:
My project includes an unoccupied lobby, does this area need to comply with ASHRAE 55?
Answer:
While ASHRAE 55 is primarily intended to apply to spaces used for sedentary or near-sedentary physical activity levels typical of office work, transient spaces like a lobby or stairwell will need to comply in most cases. However, if conditioning these transient spaces places is infeasible, projects are welcome to submit an AAP demonstrating how they are ensuring that transient spaces are maintained at a reasonable temperature.