Air Quality research

Coway Airmega 400: Large-Room CADR, Noise, and Filter Cost

Coway Airmega 400 specifications, source notes, and buying context based on published product information.

Written by BenchPicked Editorial Team · Sources checked May 16, 2026

Decision research map for Coway Airmega 400: Large-Room CADR, Noise, and Filter Cost based on published information
BenchPicked decision research: published facts, constraints, alternatives, and source records.

Decision answer

Bottom line

Coway Airmega 400 lists a smoke CADR of 328 CFM alongside a room-size claim of 1560 sq ft. Use the CADR, not the room-size claim alone, to compare cleaning rates; check the operating setting and replacement-filter cost.

For
people choosing a room air cleaner for a defined room and operating routine
Decision
decide whether Coway Airmega 400 fits the intended job and purchase constraints
Context
matching cleaned-air delivery, noise, filter upkeep and room conditions

Decision matrix

Read each published value in the context of the decision it can actually support.

Coway Airmega 400 decision matrix
FactorPublished informationHow to use it
Categoryair purifierUse the exact published value to compare like-for-like products; an omitted value remains unknown.
ModelAirmega 400Use the exact published value to compare like-for-like products; an omitted value remains unknown.
Coverage Area Sqft1560 sq ftUse this to match the documented capacity to the room or task; do not compare an unlabeled maximum claim as equivalent.
Cadr Smoke328 CFMUse this to match the documented capacity to the room or task; do not compare an unlabeled maximum claim as equivalent.
Noise Level Db22-52 dBCompare the level together with the operating setting and distance, especially for bedroom or close-range use.
Dimensions14.8 x 14.8 x 22.8 inCheck this against the installation, storage or carrying constraint before ordering.
Weight24.7 lbCheck this against the installation, storage or carrying constraint before ordering.

Claim and evidence record

manufacturer attributed

Air Quality Sensor: pollution sensor

This field is attributed to the cited manufacturer documentation; BenchPicked did not independently measure it.

Coway official Airmega 400 specifications

source attributed

Cadr Dust: 328 CFM

This field is attributed to the cited standards or certification directory and remains limited to its listed model and scope.

AHAM Verifide room air cleaner directory

source attributed

Cadr Pollen: 400 CFM

This field is attributed to the cited standards or certification directory and remains limited to its listed model and scope.

AHAM Verifide room air cleaner directory

manufacturer attributed

Filter Type: pre-filter plus Max2 activated carbon and Green True HEPA filter

This field is attributed to the cited manufacturer documentation; BenchPicked did not independently measure it.

Coway official Airmega 400 specifications

When another option is the better fit

A higher-CADR purifier

Choose this when the room is larger or faster air cleaning matters more than size.

A quieter compact purifier

Choose this when night use and close placement matter more than peak airflow.

Source control or ventilation

Choose this when the pollutant source can be removed instead of filtered.

Decision support

Fit and ownership checks

Fits when

  • Readers matching this audience: people choosing a room air cleaner for a defined room and operating routine
  • Decisions that require this task: decide whether Coway Airmega 400 fits the intended job and purchase constraints
  • Use in this stated context: matching cleaned-air delivery, noise, filter upkeep and room conditions

Complete before comparing total cost

  • Replacement-part price, availability, and expected interval
  • Electricity cost at the expected operating setting and local tariff
  • Current device price, shipping region, and availability
  • Required accessories, consumables, or paid services

Sources used for this decision

Evidence boundary: this module compares cited published information. It does not add first-hand measurements or infer results outside the stated source conditions.

Decision data

Is Coway Airmega 400 a good fit for my room, noise limit, and ownership budget?

Coway Airmega 400 lists a smoke CADR of 328 CFM alongside a room-size claim of 1560 sq ft. Use the CADR, not the room-size claim alone, to compare cleaning rates; check the operating setting and replacement-filter cost.
Category
air purifier
Model
Airmega 400
Coverage Area Sqft
1560 sq ft
Cadr Smoke
328 CFM

Evidence boundary

Published specifications are attributed to their named sources and are not BenchPicked laboratory measurements.

Air purifier specifications and ownership-cost datasetVersion 2026.09.24. Normalized CADR, room-size, noise, power, filtration, and evidence-status fields for the current BenchPicked air-purifier set.

Current buying option

Check the seller terms before ordering

Use the evidence and limitations above to decide whether this product fits. Price, availability, shipping, and return terms can change on the seller page.

Check price on Amazon Seller: Amazon (paid link) We may earn a commission from Amazon.

Research details

Specification basis

According to manufacturer specifications and published source data, Coway Airmega 400 is an air purifier. CADR values are dust 328 CFM, smoke 328 CFM, and pollen 400 CFM. Coverage is listed as 1560 sq ft. Filter type is pre-filter plus Max2 activated carbon and Green True HEPA filter.

Source boundaries

Coway Airmega 400 is described from Coway official Airmega 400 specifications, AHAM Verifide room air cleaner directory.

Ownership cost and purchase terms

For Coway Airmega 400, carry Air Quality Sensor, Auto Mode, Cadr Dust, Cadr Pollen into the ownership comparison.

Coway Airmega 400 comparison snapshot

Coway Airmega 400 lists smoke, dust, and pollen CADR as 328 CFM / 328 CFM / 400 CFM; stated coverage is 1560 sq ft; and the published noise range is 22-52 dB.

Published specs

Source-attributed specification table
FieldValueSource basis
Air Quality Sensorpollution sensorSource Attributed (view source)
Auto ModeyesSource Attributed (view source)
BrandCowaySource Attributed (view source)
Cadr Dust328 CFMSource Attributed (view source)
Cadr Pollen400 CFMSource Attributed (view source)
Cadr Smoke328 CFMSource Attributed (view source)
Categoryair purifierSource Attributed (view source)
Coverage Area Sqft1560 sq ftSource Attributed (view source)
Dimensions14.8 x 14.8 x 22.8 inSource Attributed (view source)
Energy StaryesSource Attributed (view source)
Filter Typepre-filter plus Max2 activated carbon and Green True HEPA filterSource Attributed (view source)
ModelAirmega 400Source Attributed (view source)
Noise Level Db22-52 dBSource Attributed (view source)
Power Consumption W66 WSource Attributed (view source)
Price Range$$$Source Attributed
Weight24.7 lbSource Attributed (view source)

Buying options

Approved affiliate buying links for Coway Airmega 400: Large-Room CADR, Noise, and Filter Cost
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* Affiliate links - prices may vary. Last checked: Sep 26, 2026.

Source notes

Questions

What CADR values are published for Coway Airmega 400?

Published CADR values for Coway Airmega 400: dust 328 CFM, smoke 328 CFM, pollen 400 CFM.

What room coverage is listed for Coway Airmega 400?

The selected sources list coverage for Coway Airmega 400 as 1560 sq ft.

What filter type does Coway Airmega 400 use?

The selected sources describe Coway Airmega 400 with pre-filter plus Max2 activated carbon and Green True HEPA filter.

Before you buy

Recheck fit and current terms

Confirm Coway Airmega 400: Large-Room CADR, Noise, and Filter Cost's model, included items, delivery, return policy, and any recurring costs before checkout.

Check price on Amazon Seller: Amazon (paid link) We may earn a commission from Amazon.

How BenchPicked separates published facts, analysis, and evidence limits