More Ways to Keep Smoke Out of Your Home In addition to using a high MERV filter in your HVAC ... a fresh air intake, close it or set the system to recirculate to avoid drawing in bad outdoor ...

Fresh air filters mean cleaner air and a healthier home. When your air filters are clogged, moisture can build up in your HVAC. And whenever moisture makes an appearance, mold isn’t far behind.

Follow CR's advice for improving indoor air quality with filters for your HVAC system ... If your system has a fresh air intake, set it to recirculation mode or close the outdoor intake damper ...