If your home has central air conditioning, it can help filter out harmful particles from wildfire smoke. Ensure your system's filters are replaced regularly and use the highest filtration level your unit can handle, ideally MERV 13 or higher. Set the system to recirculate air and close any vents that draw air from outside. Run the fan continuously during smoke events to maximize air cleaning. For window or portable AC units, make sure they are well-sealed and set to recirculate air to prevent smoke from entering.