Coway Airmega ProX Air Purifier, up to 4,253 sq ft

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Product guide

Coway Airmega ProX Air Purifier, up to 4,253 sq ft

The Coway Airmega ProX is a corded air purifier listed for spaces up to 4,253 square feet, with a three-part filtration system and automatic air-quality response. Its large-room coverage claim is conditional: the listing states 2,126 sq. ft. in 30 minutes or 4,253 sq. ft. in 60 minutes, so match the stated cycle time to your room and expectations.

At a glance

Three-stage filtration combines a washable pre-filter, active carbon filter and HEPA filter, according to the listing.
Auto mode and an air-quality indicator are listed, with a manufacturer claim that airflow adjusts to detected conditions.
The listed room-area figures specify different cycle times: 2,126 sq. ft. in 30 minutes or 4,253 sq. ft. in 60 minutes.
Touch controls, filter-replacement indicator and Eco mode are listed.

Price

$609.99Save 33%

Reference price: ~~$903.69~~

Price checked: Nov 14, 2026

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Often bought together

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Pros and cons

Pros

Washable pre-filter offers a reusable first filtration stage, while the system also lists carbon and HEPA filters.
The air-quality indicator and auto mode provide a listed option for automatic airflow adjustment rather than only manual operation.
The listing includes room-area claims for large spaces and provides CADR figures for dust, pollen and smoke.

Cons

At 50 pounds and 36.6 inches tall, it is a substantial unit to position, despite the title's mention of wheels.
Corded operation requires a suitable power outlet near the placement area.

Technical specifications

23 specifications

Identity
Brand	Coway
Model	Airmega ProX
Model number	AP-3522F
Color	Mocha Beige

Coverage and filtration
Listed floor area	4253 square_feet
Filters	HEPA Filter, Active Carbon Filter, Pre-Filter
Particle retention size	0.3 micron
Listed contaminant filtration	Dust, Odors, Pet Dander, Pollen, Volatile Organic Compounds (VOCs)
Listed filtration claim	True HEPA, Active Carbon Filter, Pre-Filter
Coverage claim	[Coverage] Boasts maximum strength with its binary motor, accommodating indoor spaces up to 2,126 sq. ft. in 30 minutes or up to 4,253 sq. ft. in 60 minutes (CADR: Dust 580 / Pollen 450 / Smoke 567).
Filter performance claim	[HyperCaptive Filtration System] Combination of a Washable Pre-Filter, Active Carbon Filter, and HEPA Filter reduces 99.97% of 0.3 micron particles, including pollen and other allergens. It also reduces volatile organic compounds and odor.
Particle sensor claim	[Particle Sensor] Detect find dust, pollen, and other small particles in the air with the Particle Senor, which can detect PM 1, PM 2.5, AND PM 10.

Controls and features
Control methods listed	Touch
Special features	Air Quality Indicator, Auto Mode, Dual Purification, Eco Mode, Filter Replacement Indicator
Air-quality monitoring claim	[Real-time Air Quality Indicator] Enjoy continuous air quality monitoring and optimized purification that adjusts to changing air conditions to conserve energy and maintain the best air quality.
Automatic operation claim	[Smart Mode] Experience efficient air purification with Airmega ProX's auto mode and adaptive airflow speed.
Noise level	23 db

Power
Power configuration	Corded Electric
Wattage	65 watts

Dimensions and installation
Dimensions listed	24.3"D x 18.9"W x 36.6"H
Weight listed	50 pounds

Certifications and warranty
Certifications listed	CARB Certified, ETL Certified, Energy Star Certified
Warranty description	5 Year Manufacturer's Limited Warranty

What to know before buying

Listing details to confirm

The listing gives 4,253 square feet as the maximum area but specifies 2,126 square feet in 30 minutes and 4,253 square feet in 60 minutes. It also describes two sets of XL washable pre-filters and HEPA filters in the title, while the included-components field names only one filter set. Confirm the applicable coverage cycle and filter quantity for the selected listing.

What’s in the box

Included

Air purifier
Filter set
User manual

Who is it for?

A good fit for

Buyers seeking a large-room purifier with listed HEPA, carbon and washable pre-filter stages.
Households wanting an air-quality indicator and auto mode for sensor-responsive airflow.
People who want listed filtration for dust, pollen, pet dander, odors and VOCs.

Less suited to

Buyers who need a compact or lightweight purifier for frequent carrying.
Shoppers who need confirmed filter-set quantities or a specific room-clearing time without checking the listing details.

Coway Airmega ProX Air Purifier, up to 4,253 sq ft · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.4 / 5 · 112 ratings

5 stars74%74%
4 stars10%10%
3 stars4%4%
2 stars4%4%
1 star8%8%

Customer feedback often praises perceived purification performance, air quality and quiet operation, including a report that the unit was unobtrusive during work meetings. Other feedback is mixed on price, odor removal, size and adjustability, with some customers noting that cooking odors remain. For a large-room unit with carbon filtration, these reports make room fit and odor expectations worth considering, but individual experiences do not establish a guaranteed result.

Positive themes

Customers report favorable experiences with effectiveness, air quality and quiet operation.

Negative themes

Some customers consider the purifier expensive.

Mixed feedback

Odor removal, especially cooking odors, receives mixed feedback.
Customers differ on whether its size is appropriate and on how adjustable it is.

Frequently asked questions

How large an area does the Airmega ProX cover?

The listing claims up to 2,126 square feet in 30 minutes or up to 4,253 square feet in 60 minutes. Treat those as different cycle-time claims, not a single unconditional coverage figure.

What filters does it use?

The listed system combines a washable pre-filter, active carbon filter and HEPA filter. The listing claims reduction of 99.97% of 0.3-micron particles, but that is a manufacturer claim rather than independent verification.

Does it adjust its airflow automatically?

The product details list Auto Mode and an air-quality indicator. The manufacturer says the unit adapts airflow to changing air conditions.

What is included?

The included-components field lists the air purifier, a filter set and a user manual. The product title separately claims two sets of XL washable pre-filters and HEPA filters, so confirm the filter quantity in the selected listing.