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For good indoor air quality, it's important to review the building's thermal loads and zoning based on the current interior arrangement and occupancy.
Many existing buildings have had walls moved and cubicles added without modifying the air distribution system by relocating diffusers, registers and grilles. Cubicles and half-height partitions are prime sources of IAQ complaints as they effectively block off the air flow in a specific area.
Many people in cubicles complain of stale or stuffy air. This is because little or no air is flowing in the cubicle. Diffusers need to be placed to allow air to flow down into the cubicle area to maintain temperature and dilute contaminants. Increased air flow and redistribution of air can often satisfy complaints.