Which symptom may indicate the presence of poor Indoor Air Quality?

The symptom of sinus congestion and fatigue is closely associated with poor indoor air quality. When air quality is compromised, it may contain higher levels of pollutants, allergens, and irritants such as dust, mold, or chemical vapors. These contaminants can trigger respiratory issues, leading to sinus congestion, and may also contribute to feelings of fatigue due to the body's response to poor air quality and its efforts to cope with these irritants.

In contrast, increased energy levels, enhanced cognitive function, and clear skin with an improved mood are typically associated with a healthy, well-ventilated environment and good indoor air quality. These positive indicators suggest that the air is clean and free from harmful substances, which is the opposite of the symptoms linked to subpar indoor air conditions. Thus, sinus congestion and fatigue serve as warning signs of the negative impact that poor indoor air quality can have on health and well-being.