The use of air filters can trap some of the air pollutants. The Department of Energy’s Energy Efficiency and Renewable Energy section wrote “[Air] Filtration should have a Minimum Efficiency Reporting Value (MERV) of 13. Air filters are used to reduce the amount of dust that reaches the wet coils. Dust can serve as food to grow molds on the wet coils and ducts and can reduce the efficiency of the coils.
Moisture management and humidity control are a very important part of a heating and cooling system. High humidities give rise to mold growth and moisture indoors is associated with a higher prevalence of occupant respiratory problems.
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