HEPA Air Purifiers

True HEPA (High-Efficiency Particulate Air) refers to a filter that captures at least 99.97% of airborne particles 0.3 microns in size. That’s the particle size hardest for filters to catch, so larger and smaller particles are generally captured at even higher rates. Filters labeled “HEPA-type” or “HEPA-like” don’t always meet that standard, so check the product specs. Compare models in HEPA Air Purifiers.

In an air purifier, UV-C light is an additional stage that shines on air or filter surfaces inside the unit. It works alongside the HEPA filter rather than replacing it. Models like the HEPA UV-C Tower Air Purifier and Compact HEPA UV-C Air Purifier combine both. UV bulbs lose strength over time, so replace them as recommended. Shop the Replacement UV Bulb.

Yes. HEPA air purifiers are designed to run continuously, and air stays cleaner when the unit runs all the time rather than in short bursts. Many models include a low or sleep setting that runs quietly overnight. The Quiet HEPA Table Air Purifier is a good fit for bedrooms. Running it nonstop may mean replacing filters more often.

The best air purifier for a child’s room is quiet, sized for the space, and stable enough to stay put. A HEPA filter helps capture dust and pollen while kids sleep. The 4-in-1 Air Purifier with Night Light Projector adds a soothing light show, and the Bear-Shaped HEPA UV-C Air Purifier has a playful design. Place it out of reach of small hands.

A multi-stage air purifier cleans air in several steps, and each stage targets a different part of indoor air:

• A pre-filter catches large particles.
• A HEPA filter captures fine particles.
• Activated carbon helps reduce odors.
• Sometimes UV-C light adds a final stage.

The Smart 5-Stage HEPA and UV-C Air Purifier combines several stages in one unit.