3M Filtrete 20" x 20" Furnace Filter (4-Pack)Keep your home air cleaner with this 3M Filtrete electrostatic furnace filter. Designed to capture dust, pollen, and pet dander, this filter outperforms basic fiberglass filters while maintaining good airflow through your HVAC system.
- Captures dust, pollen, pet dander, and lint
- Electrostatic filter media attracts and holds particles
- Outperforms basic fiberglass filters
- Replace every 90 days for best performance
- 1" depth fits standard filter slots
- 20" x 20" nominal size
- 4-pack for a full year of filtration