Humidity levels for a data center are a prime concern for maintaining electrical and computing resources properly as well as ensuring that conditions are optimal for top performance. Which of the following is the optimal humidity level, as established by ASHRAE? 

Answer options:

A. 20 to 40 percent relative humidity
B. 50 to 75 percent relative humidity
C. 40 to 60 percent relative humidity
D. 30 to 50 percent relative humidity

C

The American Society of Heating, Refrigeration, and Air Conditioning Engineers (ASHRAE) recommends 40 to 60 percent relatively humidity for data centers. None of these options is the recommendation from ASHRAE.