Air purifiers sized for the room you'll actually put them in
The Winix 5510 is the one to buy for a living room and the cheaper Levoit covers a bedroom, but treat every square-footage claim here as the seller's.
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Side by side
The picks
Winix 5510 Air Purifier, True HEPA + carbon
The newer version of the long-running 5500-2, with true HEPA, a real carbon deodorization stage, auto mode and app support. It is the most complete spec sheet here without paying Coway money.
Watch outNo struck-through list price on this listing, so there is no discount to weigh it against.
Levoit Air Purifier, smart and voice control
The longest history on the page: nearly 128,000 ratings at a 4.6 average, enough that a systematic defect would have surfaced by now. Smart and voice control are both in the listing, at a third of the Coway's price.
Watch outThe listing states no room-size rating, so plan on it as a bedroom or dorm unit.
VOOPNU Air Purifier, claimed 1,076 sq ft
Twenty-seven dollars, which is the cheapest way onto this page. Read the 1,076 square feet as one air change an hour in an empty room, and treat it as a desk or small-bedroom unit.
Watch outNo brand history to fall back on, and the filter is the recurring cost that decides whether it stays cheap.
Purivortex PX500, claimed 880 sq ft
Three dollars over the VOOPNU with a more modest coverage claim, which is at least the more honest of the two numbers. A bedroom unit sold as a bedroom unit.
Watch out3,243 ratings is a modest record, and no list price means there is no discount to judge.
Levoit Air Purifier, quiet bedroom model
Near-identical to the cheaper Levoit above: same brand, same bedroom pitch, same absence of a stated room rating. The highest star average on this page, across nearly 109,000 ratings, is the only difference the two listings actually show.
Watch outIt asks more than its sibling for a difference neither product title spells out.
Mooka Air Purifier, claimed 2,200 sq ft
The largest coverage claim on this page from one of the least-established brands on it. The HEPA filter is real and the price sits mid-pack, but 2,200 square feet is a marketing figure, not a measured one.
Watch outThe struck-through list price is identical to the asking price, so there is no discount here at all.
Shark NeverChange Air Purifier, HP152
Sold on the filter rather than the airflow, which is the right thing to sell a purifier on given what replacements cost. Check what the name actually covers on the listing before paying for it.
Watch out1,577 ratings is the thinnest record here, too new to show a failure pattern, and a long-life filter claim takes years to test.
Coway Mighty AP-1512HH, 3-year warranty
The only one here with a stated three-year warranty, plus an air quality monitor, auto and eco modes, a timer and a filter indicator. Buy it if the plan is to get a decade out of one machine.
Watch outA $229.99 list against a $154.99 ask is Coway's own number. Judge it on the asking price.
What actually matters here
- 01Coverage ratings are usually quoted at one air change per hour. If you are buying for allergies or smoke, divide the advertised square footage by about four and size up accordingly.
- 02Filters are the real cost of ownership. A HEPA plus carbon set every six to twelve months can exceed the purchase price over three years, so check replacement prices before you pick a brand.
- 03A long-life or washable filter claim changes that math, and it is the one specification worth chasing down on the product page rather than taking from the title.
- 04Ionizer and UV stages are optional at best, and some ionizing modes produce ozone. If a unit has one, make sure it can be switched off and left off.
- 05Most purifiers only hit their rated airflow on the loudest setting. Judge a unit by how it sounds two steps down from maximum, because that is where it will live.
- 06A purifier cleans the room it is standing in, with the door closed. One capable unit you move between rooms beats a small one in every room.
Questions people actually ask
- Should an air purifier run all the time?
- Mostly yes. Particles settle and get stirred back up constantly, so a purifier that runs an hour a day accomplishes little. Running it continuously on a low, quiet setting removes more over a day than short bursts on high.
- Does a HEPA filter remove smells?
- No. HEPA captures particles, not gases, so cooking, smoke and pet odors need an activated carbon stage. Check that a model has real carbon rather than a thin carbon-dusted mesh, and expect to replace it more often than the HEPA.
- Can I wash and reuse a HEPA filter?
- Not unless the maker specifically says it is washable, and most true HEPA filters are not. Water damages the fiber mat and the filter stops sealing properly. The pre-filter is usually the washable part, so clean that and replace the HEPA on schedule.