Indoor air is more polluted than outdoor air (EPA)
Of our time is spent indoors on average
Of particles caught by True HEPA filters
Typical price range for a quality unit
An air purifier pulls air through one or more filters and removes particles like dust, pollen, pet dander, mold spores, smoke, and some bacteria and viruses. The filtered air is then pushed back into the room.
Dust, pollen, pet dander, mold, smoke particles
Allergies, asthma, general use
None
Odors, VOCs, gases, smoke smell
Cooking smells, smoke, chemicals
None
Bacteria, viruses, mold
Germ reduction
Low
Fine particles that it charges
Ultra-fine dust
Yes, caution
Odors, bacteria
Not recommended for occupied spaces
High, avoid
Particles + odors + VOCs
Best all-around choice
None
| Type | What It Removes | Best For | Ozone Risk |
|---|---|---|---|
| True HEPA | Dust, pollen, pet dander, mold, smoke particles | Allergies, asthma, general use | None |
| Activated Carbon | Odors, VOCs, gases, smoke smell | Cooking smells, smoke, chemicals | None |
| UV-C Light | Bacteria, viruses, mold | Germ reduction | Low |
| Ionizer | Fine particles that it charges | Ultra-fine dust | Yes, caution |
| Ozone Generator | Odors, bacteria | Not recommended for occupied spaces | High, avoid |
| HEPA + Carbon Combo | Particles + odors + VOCs | Best all-around choice | None |
| Pollutant | HEPA | Carbon | UV-C | Ionizer | Best Pick |
|---|---|---|---|---|---|
| Dust & Dust Mites | Yes | No | No | Partial | HEPA |
| Pet Dander | Yes | No | No | Partial | HEPA |
| Pollen | Yes | No | No | No | HEPA |
| Smoke Particles | Yes | Yes | No | No | HEPA + Carbon |
| Odors & VOCs | No | Yes | No | No | Activated Carbon |
| Bacteria & Viruses | Partial | No | Yes | No | HEPA + UV-C |
| Mold Spores | Yes | No | Yes | No | HEPA + UV-C |
CADR (Clean Air Delivery Rate) tells you how fast a purifier cleans the air. Higher is better. Match it to your room size.
| Room Size | Min CADR (Smoke) | Recommended CADR | Examples |
|---|---|---|---|
| Up to 200 sq ft | ≥100 | 130–150 | Small bedroom |
| 200–300 sq ft | ≥150 | 200–220 | Master bedroom |
| 300–500 sq ft | ≥200 | 260–300 | Living room |
| 500–700 sq ft | ≥300 | 360–400 | Open plan kitchen/living |
| 700–1000 sq ft | ≥400 | 450–500+ | Large open floor plan |
Cheap units often have tiny filters and need replacement every 3 months, so the true cost adds up fast.
Mid-range units ($150–$250) from brands like Levoit, Winix, and Coway tend to offer the best value for most US households.
Energy Star certified models use 40% less energy, so look for the label.
Answer these statements to check your air quality risk:
Tap all that apply to your home:
Wearable air purifiers can help reduce exposure to airborne particles around your breathing zone using negative ion technology. However, they do not clean entire rooms like large HEPA air purifiers.
Most certified wearable air purifiers are considered safe when properly tested and CARB approved for low or zero ozone emissions.
Most wearable models use electrostatic or ion purification technology, so they usually do not require filter replacements.
Yes. Their lightweight size, silent operation, and long battery life make them useful for planes, trains, buses, offices, and crowded public spaces.
If you have allergies, asthma, pets, live in a polluted area, or simply want cleaner air for your family — yes, an air purifier is worth it. Choose a True HEPA model sized for your room, run it consistently, and replace filters on schedule. It’s one of the most practical health investments for your home.