Keep Wildfire Smoke Out Without Sealing Yourself In

When the sky turns orange and the air quality index spikes, the standard advice is to shut every window and hunker down. That keeps a lot of smoke out, but it also traps you with rising CO2 and stale air for days at a time. There is a better balance.

The problem with sealing up for days

Closing the house during a smoke event is the right instinct, but a sealed home with people inside sees CO2, humidity, and indoor pollutants climb the longer it stays shut. You end up trading outdoor smoke for stuffy, stale indoor air, and the headaches and fog that come with it.

Filtered fresh air is the middle path

You do not have to choose between smoke and suffocation. A window ERV with a MERV 13 and activated carbon filter pulls outdoor air through filtration that captures fine smoke particles (PM2.5) and much of the smell before it reaches you. So you keep getting fresh, low-CO2 air even while the smoke is bad outside, without throwing the windows open.

Layer it with a purifier on the worst days

On the very heaviest smoke days you may want to pause outside-air intake and lean on a purifier to scrub the indoor air. The rest of the time, filtered ventilation keeps your air fresh and your CO2 down. Together they cover the full range of a smoke season. For more on how the two tools differ, read air purifier vs ERV.

Ready before the next event

The best time to set this up is before smoke season, not during it. A SWERV installs in about ten minutes in a sliding window, and replacement filters are always available when a heavy season uses one up. See SWERV here.