More than 70% of American homes have central heating and A/C, but 50% of those systems don’t get a regular filter change. In fact, 10% have never had a filter replacement. For optimum air quality, you should check your air filter every month, and replace it when it looks dirty or after three months—whichever comes first. For extra protection, install a HEPA grade furnace filter that will remove more particles overall, and also catch the tiniest ones that pass right through regular filters. As Maytag heating and air experts, we can recommend products and practices to improve the air quality of your home. Call us for a consultation today.