Which filter works well for smoke?

A high-efficiency filter rated around MERV 13, if your system can handle it.

Can my AC bring smoke inside?

Central AC usually recirculates indoor air, but leaky ducts and fresh air intakes can pull smoke in.

Air Filtration & Wildfire Smoke Protection in Modesto, CA

Upgrade the filter

Higher-efficiency filters, often rated MERV 13, capture much finer particles, including smoke. Check that your system can handle the airflow resistance.

Media filter cabinets

A deeper filter cabinet holds a thicker filter with more surface area, which filters better and lasts longer without restricting airflow.

Change filters more often

During smoke events, filters load up quickly. Check them every week or two and replace as needed.

Run the fan

On smoky days, running the fan more often moves air through the filter. Talk to your technician about settings.

Seal leaks

Leaky return ducts and gaps around the house let smoke in. See duct testing and sealing.

Fresh air intakes

If your system brings in outside air, ask how to close it during smoke events.

Portable purifiers

A portable HEPA purifier in a bedroom adds protection, especially for people with breathing problems.

Get help

Tell the technician about your system and concerns. Send a request and an HVAC technician will get in touch.

Filter sizes

Measure the filter slot or read the size on the old filter. A filter that's too small lets dirty air slip around the edges, however good its rating.

Dust and pollen too

Valley air carries farm dust and pollen through much of the year. Better filtration helps with allergies as well as smoke, and keeps coils cleaner.

UV lights and other add-ons

Some systems can add UV lights or electronic air cleaners. Ask a technician what each does, what it costs to run and whether it suits your home and system.