Yes, air purifiers can help with wildfire smoke, but only when used correctly. Air purifiers provide filtration for enclosed spaces by removing fine particles in the air, including those in smoke. Also: The smart air purifier that saved our holiday plansThese portable air cleaners can remove wildfire smoke from indoor air as long as the following conditions are met:The doors and windows remain closedThe air purifier can exchange the air in the entire roomThe air cleaner uses a HEPA filterThe air purifier is properly maintained (the filter is clean and doesn't need replacing)If you're concerned about wildfire smoke and have sensitive population members at home, you can also use a high-quality air filter in your home's HVAC system.