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IEQ

Plain-Language Definition

Indoor Environmental Quality. The conditions inside a building that affect occupant health, comfort, and productivity, including air quality, thermal comfort, lighting, and acoustics.

Technical Context

IEQ is one of the credit categories in LEED and WELL certification systems. Key parameters include temperature, humidity, CO2 levels, particulate matter, and illuminance.

Why It Matters

Poor IEQ is linked to sick building syndrome, reduced productivity, and higher absenteeism. It affects both tenant satisfaction and property value.

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