Which is NOT a focus area of indoor environmental quality (IEQ)?

• A. Exterior site design
• B. IAQ
• C. Structural integrity
• D. Acoustical comfort

Answer: (C)

Indoor environmental quality focuses on conditions inside a building that affect how occupants experience the space—things like indoor air quality, acoustical comfort, temperature, humidity, lighting, and overall occupant comfort. Structural integrity, meanwhile, is about the building’s physical safety and strength—how well it can support loads and stay sound during use. That makes it not part of IEQ, even though exterior site design can influence indoor conditions indirectly. The options that do relate to IEQ are IAQ and acoustical comfort, so the one that doesn’t fit is structural integrity.