Wildfire Smoke & Indoor Air: A Practical Guide

Portable air cleaners and high-efficiency HVAC filters can help reduce smoke particles indoors. Filtration does not remove every pollutant or make a home smoke-proof.

Start with the right filtration

• Choose a portable air cleaner sized for the room. EPA recommends a smoke clean air delivery rate (CADR) of at least two-thirds of the room area in square feet, and a CARB-certified device that produces little or no ozone. Run it continuously on the highest setting you can tolerate.
• For central HVAC, consider MERV 13 or higher only if your system supports it. Check the equipment manual or consult an HVAC professional about filter fit, airflow and fresh-air intake settings.
• Keep windows and doors closed while smoke is present, provided you can remain safely cool. Avoid indoor smoke sources such as candles and smoking. Follow local air-quality and emergency instructions.
• Follow your device's maintenance instructions. Smoke can dirty filters faster; replace dirty filters sooner when needed rather than relying on a fixed smoke-event interval.

Replacement filters for compatible air purifiers

These are replacement filters, not complete air purifiers. Match your device model and filter dimensions before ordering. Stock was checked on October 16, 2026; availability can change.

• Nispira True HEPA and carbon replacement filter compatible with PuroAir 240. Check your model and the listed 7.5 × 7.5 × 5.75-inch dimensions.
• Nispira True HEPA and carbon replacement filter compatible with part TF50-Carbon HEPA-Fresh. Approximate dimensions: 5 × 2 × 22 inches; confirm the part number against your unit.
• Nispira replacement filter compatible with A-2001, compared to part AF-2001. Listed dimensions: 6.4 × 6.4 × 6.5 inches.

High-efficiency HVAC filter option

Nispira MERV 16 replacement filter compatible with Bryant/Carrier PGAPAXX1625, compared to PGAPXCAR1625 / AGAPXCAR1625. This is not a universal HVAC filter. Actual dimensions are 17-1/4 × 24-7/8 × 2-9/16 inches. Confirm that your equipment supports this filter and rating before purchase. Stock was checked on October 16, 2026.

Browse the Air Purification collection.

Compatibility references identify the equipment these replacement filters fit; they do not indicate manufacturer affiliation or endorsement. EPA guidance is general filtration guidance, not an endorsement or performance certification of these products.

Sources: EPA: Indoor Air Filtration; EPA: How to Create a Cleaner Air Room at Home; EPA: Wildfires and Indoor Air Quality.