The PAC is located in 10 Whitmore Lab on the Penn State University Park campus. Whitmore is the next building south of Mueller Lab.
To enter Whitmore, use the north entrance directly across from Mueller. Go down the stairs to the basement and turn left to Room 10. Handicapped persons can reach the herbarium by using the main entrance on the west side of the building. There is an elevator on the first (ground floor) at the very end of the hallway. Go down to the basement level and proceed to the extreme other end of the basement to Room 10.
The PAC has an air-conditioning system that keeps the temperature at 69 degrees F with low humidity. This has the purpose of retarding mold and insect depredation. Users are advised to bring a sweater – especially in the warm weather months when light-clothing is the norm.