Environmental Engineering Reference
In-Depth Information
22. How is local exhaust ventilation used in a mechanically ventilated building?
23. Why is local exhaust ventilation in many cases more effective than general
dilution ventilation in reducing contaminant exposures in buildings?
24. What factors determine the effectiveness of local exhaust systems?
25. How is local exhaust ventilation used to control radon levels in buildings?
26. In one mechanically ventilated building, CO
2
levels were observed to peak at
10 a.m. and again at 2 p.m. Explain the reason or reasons for such differences.
