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You are at: Home > Air Quality In The Workplace6
Ventilation and Air Quality in Offices
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System Design
Intermittent air flow: Designs that specify HVAC system operation at reduced or interrupted flow during certain portions of the day in response to thermal conditioning needs (as in many variable air volume installations) may cause elevated indoor contaminant levels and impair contaminant removal. Minimum ventilation rates should be defined by air cleanliness and distribution, as well as temperature and humidity.
Distribution of air: Failure to maintain proper temperature, humidity, and air movement in a building can lead occupants to block supply registers if they emit air that is uncomfortably hot or cold; this disrupts air flow patterns. Placement of partitions or other barriers within a space can also impair air movement. In addition, locating air supply and return registers too close together can result in an uneven distribution of fresh air and insufficient removal of airborne contaminants. Precautions must be taken to maintain comfortable thermal conditions, and proper placement of supply and return registers, and furnishings.
Building supply and exhaust locations: Air supply vents that are installed too close to building exhaust vents re-entrain contaminated exhaust air into the building, increasing indoor pollution. Placement of supply vents near outdoor sources of pollution, such as loading docks, parking and heavy traffic areas, chimneys, and trash depots, provides a pathway for contaminants into the building's ventilation system. The location of all air supply vents must be carefully considered.
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Ste. S 5 