Start with the filter
The U.S. EPA recommends filters rated MERV 13 or higher for protecting against wildfire smoke, and a well sized system has to be able to move air through them. Check your filter before smoke season and replace it when it is dirty. During heavy smoke, check it more often.
- MERV 13 or higher: the level the U.S. EPA recommends for wildfire smoke
During a smoke event
- Close windows and doors. Set the system to recirculate indoor air instead of pulling in outside air.
- Run the fan more often so the filter keeps cleaning the air.
- If your system has a fresh air intake or damper, ask us how to close it during smoke.
- Add a portable HEPA cleaner in bedrooms if you can.
- Avoid frying, burning candles and vacuuming without a HEPA filter. They add to indoor particles.
Before smoke season
- Replace the filter. If you use a thicker MERV 13 filter, make sure your system can handle it.
- Have the system inspected: coil, blower, drain and ducts.
- Have leaky ducts sealed. Leaks pull attic and crawlspace air into the house.
- Choose a plan for bedrooms: a HEPA unit or an in duct HEPA option.
- Know where your filter is and how to change it.
Fireplaces and smoke
On a smoky day, don't burn wood. A sealed direct vent gas fireplace doesn't pull indoor air through the firebox. Fire agencies can also restrict outdoor burning when conditions are hazardous.
Getting ready for smoke season
We design systems to run MERV 13 filters, with HEPA options for bedrooms. Call for a free estimate.
