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Ventilation and Air Quality in Offices
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Ventilation System Problems and Solutions
The processes involved in ventilation provide for the dilution of pollutants. In general, increasing the rate at which outdoor air is supplied to the building decreases indoor air problems. The other processes involved in ventilation however, are equally important. Buildings with high ventilation rates may suffer indoor air problems due to an uneven distribution of air, or insufficient exhaust ventilation. Even in a well-ventilated building there may be strong pollutant sources which impair indoor air quality. The closer such a source is to an exhaust however, the more effective the ventilation; local exhaust ventilation, e.g., a chemical fume hood, is most effective. It is good practice to provide separate exhaust systems in areas where copy machines or solvents are used. Providing localized exhaust for these specific sources can result in a reduction of the amount of overall building exhaust ventilation necessary.
As was mentioned earlier, an HVAC system that is properly
designed, installed, operated, and maintained can
promote indoor air quality. When proper procedures
are not followed, indoor air problems may result.
Some common problems, and their solutions, are discussed
further. |
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