Air purifiers / Comparison

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The starting packages are single room purifiers with standard filters. Particle removal, gas removal and health outcomes are different claims.

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Documented specifications and exact purchase packages
Compare the details	Airmega 400S — US standard package
Community reviews	No community reviews yet. Purchase packages of the same model share one community score. Read all reviews Write a review
US purchase package	Airmega 400S, White, one US Wi-Fi model with the standard filters. Product & sources Includes two pre-filters and two Max2 filters, one set on each side. Select the 400/400S replacement set; the 300/300S filter set is a different item. The linked US model is rated for 120 V/60 Hz. Sources · 2026-09-13 Coway: Airmega 400S — US product and specificationsChecked 2026-09-13. Read the original source and its check date before relying on this value.Coway: Airmega 300, 400 and S-series US manualChecked 2026-09-13. Read the original source and its check date before relying on this value.Coway: Airmega 400 and 400S Max2 Filter SetChecked 2026-09-13. Read the original source and its check date before relying on this value. Review due. Check the current source before buying.
Where to buy	Select: Airmega 400S, White, one US Wi-Fi model with the standard filters. View at Coway US — Airmega 400S — US standard package; opens in a new tab The link may open several packages. Check current price and availability with the seller. Opens in a new tab.
External rating	4.1 out of 5 from 45 ratings · Coway US store · Checked October 23, 2026.
Smoke CADR Clean-air delivery rate specifically identified for smoke particles. Compare like-for-like particle ratings; this is not a gas-removal or health-outcome rating.	328 cfm Sources · 2026-09-13 Coway: Airmega 400S — US product and specificationsChecked 2026-09-13. Read the original source and its check date before relying on this value.Coway: What are air filter ratings?Checked 2026-09-13. Read the original source and its check date before relying on this value. Review due. Check the current source before buying.
Dust CADR Clean-air delivery rate specifically identified for dust. Keep this separate from smoke and pollen CADR.	328 cfm Sources · 2026-09-13 Coway: Airmega 400S — US product and specificationsChecked 2026-09-13. Read the original source and its check date before relying on this value.Coway: What are air filter ratings?Checked 2026-09-13. Read the original source and its check date before relying on this value. Review due. Check the current source before buying.
Pollen CADR Clean-air delivery rate specifically identified for pollen. Use the same particle type when comparing models.	400 cfm Sources · 2026-09-13 Coway: Airmega 400S — US product and specificationsChecked 2026-09-13. Read the original source and its check date before relying on this value.Coway: What are air filter ratings?Checked 2026-09-13. Read the original source and its check date before relying on this value. Review due. Check the current source before buying.
CADR without a named particle type A maker-listed CADR whose particle type is not specified by the cited source. This value is not substituted for a smoke, dust or pollen rating.	Not verified We have not verified this value. It is not a confirmed no or zero. Check the original source or ask the manufacturer if it affects your choice. The cited specifications provide separate particle ratings and no additional unnamed CADR. Source · 2026-09-13 Coway: Airmega 400S — US product and specificationsChecked 2026-09-13. Read the original source and its check date before relying on this value. Review due. Check the current source before buying.
Advertised room area The documented room area at the air-change assumption below. Area claims at different ACH are not directly equivalent; check ceiling height and layout.	1560 sq ftPaired with 2 ACH; the manual specifies an 8 ft ceiling. Sources · 2026-09-13 Coway: Airmega 400S — US product and specificationsChecked 2026-09-13. Read the original source and its check date before relying on this value.Coway: Airmega 300, 400 and S-series US manualChecked 2026-09-13. Read the original source and its check date before relying on this value. Review due. Check the current source before buying.
Room-area air changes Air changes per hour used for the displayed room-area claim. Read this together with room area. Actual airflow depends on placement and operating setting.	2 ACHApplies to 1,560 sq ft. The manual also gives 780 sq ft at 4 ACH. Sources · 2026-09-13 Coway: Airmega 400S — US product and specificationsChecked 2026-09-13. Read the original source and its check date before relying on this value.Coway: Airmega 300, 400 and S-series US manualChecked 2026-09-13. Read the original source and its check date before relying on this value. Review due. Check the current source before buying.
Rated power The documented rated or maximum electrical input, as qualified by the source. Actual energy use depends on the fan setting. Read the source conditions alongside the value.	66 W Sources · 2026-09-13 Coway: Airmega 400S — US product and specificationsChecked 2026-09-13. Read the original source and its check date before relying on this value.Coway: Airmega 300, 400 and S-series US manualChecked 2026-09-13. Read the original source and its check date before relying on this value. Review due. Check the current source before buying.
App control Whether the listed model supports control through the manufacturer’s app. Check phone requirements, network setup and which controls remain available on the unit.	YesThe S model supports Wi-Fi and mobile app control. Source · 2026-09-13 Coway: Airmega 400S — US product and specificationsChecked 2026-09-13. Read the original source and its check date before relying on this value. Review due. Check the current source before buying.
Standard replacement filter The named replacement for the standard included filter where verified. Match the exact purifier model and distinguish standard filters from optional specialty versions.	Airmega 400 / 400S Max2 Filter Set, SKU 3104756 — two filtersOne Max2 filter fits each side; the washable pre-filters are separate components. Source · 2026-09-13 Coway: Airmega 400 and 400S Max2 Filter SetChecked 2026-09-13. Read the original source and its check date before relying on this value. Review due. Check the current source before buying.
Questions to check before buying	The 1,560 sq ft area assumes 2 ACH and an 8 ft ceiling; it is not a 4.8 ACH room rating.

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