In fact, opening a window for at least five minutes a day should be enough to decrease the concentration of indoor air pollutants. Most home heating and cooling systems, including forced air heating systems, do not mechanically bring fresh air into the house, so manual really is the way to go. Given that we all spend a fair amount of time indoors these days, it’s critical to do what you can to reduce indoor air pollution, especially if you have children. Looking for other ways to decrease indoor air pollution at home? Consider switching over to nontoxic cleaning products, implementing a “no-shoe” policy at home, replacing chemical air freshers with essential oils or clean-burning candles, dusting and deep-cleaning often, and investing in a HEPA air purifier for high-traffic rooms like the bedroom and living room.