For many people, hot summer weather means outdoor fun. It’s hard to resist the siren call of the beach and the family road trip when the mercury rises and the days get longer. But summertime also means that wildfires, thunderstorms, and air quality alerts will sometimes send you back inside into the hopefully cooler but often not-so-fresh air. Fortunately, we’ve rounded up 12 ways to maintain cleaner indoor air during the summer months.