Coway Airmega ProX

Name: Coway Airmega ProX
Brand: Coway
SKU: Airmega ProX (AP-3522F_US)
Price: 667999 USD
Availability: InStock

Explore the Coway Airmega ProX's powerful filtration, massive room coverage, CADR, noise levels, energy use, filter life, and key features before buying.

Coverage

4,253 ft2 (395 m2) at 1 ACH; 2,126 ft2 (198 m2) at 2 ACH

HEPA Grade

Green True HEPA Filter (99.999% down to 0.01 microns per Coway testing)

Noise

23-46 dB(A)

Power

65 W (Maximum Rated Power)

Warranty

5-Year Limited Manufacturer Warranty

App Control

$667—$999

Key Features

Dual-sided air intakeMax2 Filter (Carbon+Green HEPA)PM1.0/2.5/10 sensorsSmart Auto/Eco/Silent/Turbo Modes

Expert Analysis

Full Review

The Coway Airmega ProX is a high-capacity air purifier designed for extra-large indoor spaces, using a washable pre-filter and Max2 filter that combines activated carbon with HEPA filtration. Its dual-sided air intake supports high airflow, while the unit delivers CADR ratings of 568 CFM for smoke, 580 CFM for dust, and 450 CFM for pollen. Coway rates it for up to 2,126 square feet at two air changes per hour, with coverage extending to 4,253 square feet at one air change per hour. PM1, PM2.5, and PM10 sensors support automatic airflow adjustment, while noise levels range from 23—46 dB(A).

Quick Verdict

Pros & Cons

Pros5 points

5-year limited manufacturer warranty is among the longest in this review
Genuine multi-sensor Smart Auto Mode (PM1.0/2.5/10) rather than a single-particle-size sensor
Large manufacturer-rated coverage (2,126 ft² at 2 ACH) suited to big open-plan homes
Dual-sided air intake design increases effective airflow for its size class
HEPA performance claim (99.999% down to 0.01 microns) is backed by Coway's published lab testing methodology

Cons4 points

Premium price (~$700-900) — one of the most expensive units in this review
51 lb unit is large and heavy; not something you casually move between rooms
No Wi-Fi/app control despite the premium price point
No dedicated timer function officially listed, unlike most other units in this price range

5 pros56% positive overall4 cons

Technical Data

Full Specifications

Specification	Value
Model Number	Airmega ProX (AP-3522F_US)
Voltage	120V AC, 60Hz (US Version)
AC/DC	AC (Mains Powered)
Weight	51 lb (23 kg)
Height	36.6 in (93 cm)
Width	18.9 in (48 cm) (Depth: 24.3 in / 62 cm)
Warranty	5-Year Limited Manufacturer Warranty
App/Mobile Control	❌ No
Timer	No dedicated timer function officially listed
Display Type	LED Touch Control Panel with PM1.0/2.5/10 Digital Display
Fan Speeds	3
Room Coverage	4,253 ft2 (395 m2) at 1 ACH; 2,126 ft2 (198 m2) at 2 ACH
HEPA Grade	Green True HEPA Filter (99.999% down to 0.01 microns per Coway testing)
Filter Type	Washable Pre-Filter + Max2 Filter (Activated Carbon + Green True HEPA)
Air Changes/Hour	2 ACH at 2,126 ft2; 1 ACH at 4,253 ft2
Noise Level	23-46 dB(A)
Energy Consumption	65 W (Maximum Rated Power)
Annual Running Cost	~$17-35/year (estimated from 65W)
Auto Mode	✅ Yes
Best For	Extra-Large Homes, Open Floor Plans, Allergies, Smoke, Wildfire Smoke, Commercial Spaces
Features	Dual-sided air intake, Max2 Filter (Carbon+Green HEPA), PM1.0/2.5/10 sensors, Smart Auto/Eco/Silent/Turbo Modes

Common Questions

Frequently Asked Questions

What is the Coway Airmega ProX designed for?

This model is designed for air purification in large indoor spaces. Coway lists coverage of up to 2,126 sq. ft. at two air changes per hour, with a larger 4,253 sq. ft. figure at one air change per hour.

How does the Coway Airmega ProX Air Purifier filter indoor air?

It uses a washable pre-filter and Max2 filter that combines activated carbon with Green True HEPA „¢ filtration. The system is designed to capture airborne particles while the carbon component helps address certain odors.

What does the CADR rating indicate for this air purifier?

The listed Clean Air Delivery Rate is 568 CFM for smoke, 580 CFM for dust, and 450 CFM for pollen. CADR is a useful performance metric for comparing how quickly an air purifier can deliver filtered air, but actual results depend on room conditions and operation.

Does the ProX monitor indoor particle levels?

Yes, the unit includes particle sensing for PM1, PM2.5, and PM10, and its automatic operation can adjust airflow based on detected air conditions.

How often should the main filter be replaced?

The manufacturer lists an expected one-year life for the Max2 filter. Actual replacement needs can vary with usage and indoor air conditions, so users should also follow the manufacturer's maintenance and replacement guidance.