Coway Airmega 400

Smart air purifier · $388.99 · price checked 2026-08-24 · editorial score 86/100

Spec sheet

Room size	1560 ft² AHAM-rated · 3120 ft² at 1 ACH
CADR ✓₂	smoke 328, dust 328, pollen 400 cfm ✓₂
Ozone status ✓₂	CARB-certified (Mechanical) — list entry Airmega 400(G)/(W), model AP-2015F, certified 2026-01-13, approval G-26-006; Coway's product page makes no additional ozone statement.
Filter type	True HEPA
Filter stages	Washable pre-filter, Max2 combined carbon+HEPA
Noise	22–52 dB
Sensors	PM2.5/air-quality
Auto mode	Yes
App / ecosystem	No app (manual controls)
Humidifier combo	No

Offer

$388.99

Price checked 2026-08-24

In Stock

Buy link unavailable

Link withheld pending verified Associates account (compliance fail-closed).

Scraped from the live listing on 2026-08-24; point-in-time price, not an offer.

CADR — Clean Air Delivery Rate (dual-sourced)

328 cfm smoke · 328 dust · 400 pollen (Coway-stated) (source conflict noted)

Coway product page (cowaymega.com): “CADR (Clean Air Delivery Rate): 328 (Smoke), 328 (Dust), 400 (Pollen)”
Vacuum Wars review: “Coway also provides their own CADR (clean air delivery rate) numbers of 328 for smoke, 328 for dust and 400 for pollen.”

Conflict note: One review cites AHAM figures of 350/360; the manufacturer figure set (328/328/400) is repeated by two independent reviews and used here.

Ozone emission status (dual-sourced)

CARB-certified (Mechanical) — list entry Airmega 400(G)/(W), model AP-2015F, certified 2026-01-13, approval G-26-006; Coway's product page makes no additional ozone statement.

California Air Resources Board certified-device list: “Coway | Airmega 400(G) | AP-2015F(G) | Mechanical | 2026-01-13 | G-26-006”

Known limitations

Not Wi-Fi or app-enabled despite smart auto/eco/sleep modes.

Compare it against

Blueair Blue Pure 211i Max

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Independent comparison. Prices are point-in-time scrapes from Amazon.com listings, not offers. CADR figures render only where two independent sources agree; ozone status is checked against the California Air Resources Board certified-device list. No health claims beyond manufacturer documentation.