Which factor does NOT typically contribute to sick building syndrome?

High energy efficiency measures, when implemented correctly, can actually lead to improved indoor air quality and, in turn, reduce the occurrence of sick building syndrome. These measures often involve better insulation and sealing of buildings, which can minimize the entry of outside pollutants. While it is essential to ensure that energy efficiency does not compromise ventilation, well-designed energy-efficient buildings can support healthy indoor environments through controlled airflow and the use of advanced filtering systems.

In contrast, poor indoor air quality, exposure to harmful chemicals, and inadequate ventilation are well-documented contributors to sick building syndrome. Poor indoor air quality may arise from various factors, such as mold growth, dust, or allergens, which can trigger health issues. Harmful chemicals from building materials and furnishings, as well as volatile organic compounds (VOCs), can also lead to health problems when occupants are exposed over time. Inadequate ventilation restricts the circulation of fresh air, allowing indoor pollutants to accumulate and exacerbating health symptoms among occupants.