Collection: Air Purifier Filters

Air Purifier Filters

An air purifier only performs as well as the filter inside it. Replacement air purifier filters trap airborne particles as room air passes through the unit, which is what keeps indoor air cleaner and keeps the purifier moving air efficiently. The particles these filters are designed to capture include dust, pollen, mold spores, lint, and pet dander. Households dealing with allergies or asthma tend to notice the difference first, and a fresh filter also helps reduce the odors left behind by cooking and by smoke.

Air purifier filters come in several types, and the type determines what the filter is built to handle.

• HEPA filters, designed to capture very small airborne particles, including many common household allergens.
• Activated carbon filters, designed to absorb odors, fumes, smoke, and chemical vapors rather than particles.
• Pre-filters, which catch larger debris before it reaches the main filter and help extend the life of the stage behind them.

Many purifiers combine two or three of these stages in a single unit, so a full replacement set for one machine may include more than one filter. Running a purifier without its pre-filter, or with a loaded one, shortens the life of the HEPA stage it was meant to protect.

Before ordering, confirm the filter is sized for the purifier and matches the model number printed on the unit or on the old filter, since a filter that is close but not exact will let air slip past the media. Replacement intervals vary by design and by how often the purifier runs, so check the manual for the schedule the manufacturer suggests. A subscribe and save plan keeps a fresh filter arriving on schedule, which takes the guesswork out of maintenance.