Independent research · Manufacturer & AHAM data · Updated August 2026
These two are the closest rivalry in mid-size air purification: near-identical CADR, same room coverage, similar prices, both long-time best-sellers. Search results will tell you one "wins" — the honest answer is that they clean the same air, and the decision comes down to three tiebreakers: filter maintenance rhythm, ionizer philosophy, and noise.
| Spec | Coway AP-1512HH | Winix 5500-2 |
|---|---|---|
| CADR (dust/pollen) | ~246 | ~243-246 |
| Coverage (AHAM 2/3) | ~361 sq ft | ~361 sq ft |
| Low-speed noise | ~22.8-24dB | ~27-28dB |
| HEPA filter | 12 months | 12 months (Filter H) |
| Carbon cycle | 6 months | 3 months |
| Ionizer | Vital Ion, switchable off | PlasmaWave, switchable off |
| Auto mode + sensor | Yes, particle sensor | Yes, smart sensor |
| Typical street price | ~$190-$230 | ~$150-$180 |
| Genuine yearly filters | ~$50-$65 | ~$50-$65 (4 carbon swaps) |
Based on manufacturer specifications and AHAM certification data; street prices checked August 2026.
Yearly genuine-filter cost lands in the same $50-$65 zone, but the shape of the chore differs. The Coway asks for a carbon swap twice a year; the Winix wants one every 3 months. Same money, double the errands on the Winix — though its carbon sheets are cheap and compatible bundles are plentiful (details in our 5500-2 filter guide and AP-1512HH filter guide).
Both include an optional ionizer (Coway Vital Ion, Winix PlasmaWave), both CARB-certified within limits, both fully defeatable. If you want zero ions — nursery, asthma, personal preference — either works with the button off. No edge; just don't pay extra for "ion technology" as if it were the cleaning mechanism. The HEPA does the work.
The Coway's low speed is a few decibels quieter and its housing feels denser; light sleepers and bedroom buyers notice. The Winix's front panel and controls feel more utilitarian, which is fine at its lower price.
It's a tie — both ~246 CADR, ~361 sq ft. Decide on maintenance, noise and price.
Similar genuine cost (~$50-$65/yr); the Winix adds two extra carbon swaps a year, the Coway adds purchase price.
CARB-certified within ozone limits and fully switchable off; ozone-averse users simply leave it off.
Coway, by a few decibels on low — the bedroom edge.
Both units are the correct tool for ~360 sq ft rooms — the rare "can't go wrong" pairing. Check today's prices and let the discount tip the tie.
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