Indoor Air Purification During Wildfire Smoke: Health Benefits & What the Research Shows

How Much Particulate Matter Is in Your Home, Office, or School?

Ambient fine particulate matter (PM2.5) is a major global health threat. Short-term PM2.5 exposure has been linked to substantial productivity losses from premature deaths across 1,066 locations in seven countries from 2000 to 2019. Research estimates that productivity-adjusted life-years (PALYs) lost to premature deaths increased by 2.70% for each 10-μg/m³ rise in PM2.5. Risks were higher among women, adults aged 15–44, and people in lower-middle-income areas.

Overall, 5.0% of PALYs lost from premature deaths were attributable to PM2.5, equal to an annual economic cost of US$21.5 billion. Lowering PM2.5 below the World Health Organization air quality guideline could prevent 3.5% of PALY losses and avoid US$16.7 billion in annual costs.

Benefits of Indoor Air Purification During Wildfire Smoke Events

Wildfire-related PM2.5 is an increasing global health threat. A cost-effectiveness analysis assessed indoor air purifiers as a way to reduce fire-related PM2.5 exposure across more than 3,500 subnational units from 2003 to 2021.

Key Findings

• Air purification could prevent 60.8 million DALYs from fire-related PM2.5.
• It could also prevent 2.2 billion DALYs from all-source PM2.5 worldwide.
• Cost-effectiveness was greatest in high-income countries, while affordability remains a barrier in lower-income regions.

Implications

As wildfire risks grow, these findings support targeted subsidies, international aid, and equitable local strategies to make indoor air purification more accessible worldwide.

Protect Your Indoor Air with Well Building Connection

You don’t have to wait for policy change to protect your family. Our HEPA Air Purifier is designed to filter fine particulate matter — including wildfire smoke particles — from your indoor air. Pair it with our 8-in-1 Smart Air Quality Monitor to track PM2.5 levels in real time and know exactly when your air quality needs attention. For a natural, chemical-free option, our Bamboo Charcoal Air Purifying Bags absorb pollutants and odors passively in any room.

The Bottom Line

The science is clear: indoor air purification is one of the most cost-effective interventions available to reduce the health impacts of wildfire smoke and everyday PM2.5 exposure. Taking action at home is something you can do today.

Sources: Han, D., Guo, Y., Ji, J.S. et al. Global health benefits and cost-effectiveness of indoor air purification to mitigate PM2.5 from wildfire smoke. Nat. Health 1, 745–759 (2026). Wen, B., Ademi, Z., Wu, Y. et al. Labour productivity loss and economic burden from PM2.5-related mortality in multiple countries. Nat. Health (2026).