What preventative measure can help improve indoor air quality?

Regularly changing air filters is an effective preventative measure for improving indoor air quality. Air filters work by trapping dust, allergens, and other particles in the air that could impact health. Over time, filters can become clogged and less effective, allowing contaminants to circulate within the indoor environment. By routinely changing or cleaning the filters according to manufacturer recommendations, you ensure that the HVAC system functions efficiently and that better quality air is circulated throughout the space. This practice helps reduce airborne allergens and pollutants, contributing to a healthier indoor environment.

The other options may have their benefits but do not directly address the enhancement of indoor air quality as effectively. Limiting the use of heating and cooling could lead to stagnant air, while installing carpets could trap dust and allergens instead of improving air quality. Keeping windows open at all times may not be feasible due to outdoor air pollution or weather conditions, which might further compromise indoor air quality rather than improving it.