Which air quality issue can be minimized by using filters in HVAC systems?

Using filters in HVAC systems is particularly effective in minimizing the presence of dust and allergens in the air. HVAC filters are designed to capture particulates, including dust, pollen, pet dander, and other allergens, before they circulate throughout indoor spaces. By trapping these airborne particles, filters improve the overall air quality and contribute to a healthier living environment.

This function of air filters helps individuals who are sensitive or allergic to certain allergens, reducing potential health issues related to respiratory problems. Maintaining clean filters is also crucial as clogged filters can decrease the system's efficiency and lead to further circulation of contaminants.

While the other options relate to air quality, they are not primarily addressed through the use of filters. For example, stale air is often improved through ventilation rather than filtration, excess humidity requires dehumidification solutions, and temperature fluctuations relate more to the heating and cooling processes rather than filtration. Therefore, the use of filters specifically targets the reduction of dust and allergens, enhancing indoor air quality effectively.