Last updated:
Quick answer
For wildfire smoke, focus on reducing exposure to fine particles indoors. The practical household stack is:
- Check local smoke and air-quality advisories.
- Pick one clean-air room.
- Use a properly sized HEPA or high-efficiency portable air cleaner.
- Keep windows and doors closed when outdoor smoke is worse.
- Avoid ozone-generating devices.
Pick your problem
Size an air purifier for a room: → Air purifier size calculator
Choose between HEPA and carbon filters: → HEPA vs carbon filters → Air purifier Canada buying guide
Build a clean-air room: → Clean-air room guide → Best air purifier Canada
Filter smoke with furnace or DIY options: → Furnace filters MERV 13 → DIY box fan filter
Calculators and tools
- Air purifier size calculator — Estimate smoke CADR from room size and ceiling height
What matters most
Cleaner-smelling air is not automatically cleaner air. For wildfire smoke, particle filtration and room sizing matter first.
CADR, room size, filter type, noise, replacement-filter cost, and ozone avoidance matter more than app features and spaceship-looking plastic.
Official sources used
Wildfire smoke: health effects of exposure
Health Canada
PM2.5 risk framing and vulnerable household context.
Using a portable air cleaner to filter wildfire smoke
Health Canada
CADR sizing, clean-air-room guidance, HEPA/carbon distinctions.
Health Canada
Why ozone generators are not appropriate for occupied homes.
Wildfire smoke, air quality and your health: Protecting your physical and mental health
Health Canada
Wildfire smoke protection guidance, including high-quality HVAC filters, certified portable air cleaners, DIY air cleaner caveats, newer certified box fans, filter changes, and not leaving DIY fans unattended or running while sleeping.