What are the concerns with wildfire smoke?
- Wildfire smoke is a mix of gases and fine particles that can cause a number of breathing and respiratory issues.
- The primary concern with wildfire smoke is fine particulates
Are N95 masks effective at protecting me from smoke?
- The best solution is to remain indoors and provide high-efficiency air filtration, but if you must be outside a tightly fitting N95 or P100 respirator can provide some benefit.
Who is sensitive to wildfire smoke?
- People with lung disease, asthma, chronic obstructive pulmonary disease (COPD), or current or recent respiratory infections.
- People older than 65 due to increased risk of lung disease or younger than 18 with lungs still developing.
- People who smoke.
- Outdoor workers with higher exposures.
What should I do to protect myself from smoke?
- Stay indoors and keep doors and windows closed.
- Relocate to areas less impacted by smoke.
- Avoid using air conditioning units that are not effective at filtering smoke from the outside air, including simple window AC units or those without high-MERV filters. For best results, upgrade AC filters to high-MERV filters (MERV-13) or use room air purifiers in addition to AC.
- Put HVAC systems into recirculate mode to reduce bringing in additional smoke.
- Use a portable air cleaner (preferably in each occupied room) set to the highest speed to filter indoor air.
- If you do not have a portable air cleaner, you can build a "do it yourself" version based on a box fan and furnace filters:
- Avoid strenuous activities to reduce breathing in smoke.
- If you must be outside, an N95 mask or P100 respirator that fits tightly may provide some benefit.
- If driving during a smoke event, use the Recirculate Air button in your car.
What if I don’t have air conditioning and it’s too hot to keep doors and windows closed?
- Set HVAC systems to recirculate mode to reduce bringing in additional smoke.
- If it's too hot inside, consider going to an air-conditioned public place like a library or shopping center for temporary relief.
- Use a portable air cleaner (preferably in each occupied room) set to the highest speed to filter indoor air.
- If you do not have a portable air cleaner, you can build a "do it yourself" version based on a box fan and Merv 13 furnace filters:
What can commercial buildings do to improve indoor air quality?
- Keep doors and windows closed as much as possible.
- Run HVAC systems on recirculate mode and limit intake of fresh air into the building.
- Upgrade filters on HVAC systems to higher efficiency models, MERV 13 or higher.
- Consider using low-cost sensors to monitor indoor particulate matter to measure the effectiveness of filters and HVAC systems.
Where can I get information on smoke levels in my area?
- The AirNow Fire and Smoke Map shows the areas impacted by smoke as well as current particulate levels based on air quality monitors in the area.
- Fire and Smoke Map