suitable:
- **Areas with high humidity:** McLean County in central Illinois has high humidity levels. For example, Bloomington, the county seat, has an average
humidity of 85% in July, and average humidity levels in January, June, and December are also high, reaching 80%. Additionally, Lake County and Kane
County in northern Illinois, near the Great Lakes, also have relatively high humidity levels due to the influence of the lakes, making them suitable for
installing ERV ventilation systems to control humidity.
- **Areas with poor air quality:** Jefferson County and Wayne County in southern Illinois have issued Air Pollution Action Day alerts from the Illinois
Environmental Protection Agency due to wildfire smoke. Furthermore, Cook County in northeastern Illinois, especially around Chicago, has a dense
population and high levels of industrial and traffic emissions, making it prone to air quality deterioration under certain meteorological conditions such
as high temperatures. Installing ERV ventilation systems in these areas helps improve indoor air quality.
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