Coway Airmega 150 Review: Is It Worth Buying?

Full Review

The Coway Airmega 150 is a sleek, compact air purifier characterized by simple controls, high-quality filtration technology, and availability in unique colors.

It offers some advanced features, including an air quality sensor and auto mode, produces no ozone, and performed well in our tests.

I’d say the Coway Airmega 150 feels like a refreshing addition to the air purifier market—especially in terms of design improvements.

One of the main questions people ask is whether it’s a true replacement for the popular Coway AP-1512HH. Is it? Keep reading to find out why.

In this article, I’ll provide a detailed overview of its features and specifications, along with the results from our tests: airborne particle removal, noise levels, and power consumption.

How We Tested the Coway Airmega 150?

1. For the filter efficiency testing, we used the Temtop LKC-1000S laser particle meter, which measures PM2.5 (µg/m3), PM10 (µg/m3), Particles (per/L), and HCHO (mg/m3) in the air, and also calculates the AQI.

2. We placed the Coway Airmega 150 in a 194 sq. ft. (18 m²) room. Then, we recorded the initial air quality values using the Temtop laser particle meter and let the Coway Airmega 150 run at maximum speed.

3. After 60 minutes, we measured the new values using the Temtop laser particle meter and saved the data.

4. Next, we placed the Coway Airmega 150 in a glass box, which we then filled with smoke. Then, we measured how much time was needed for the air purifier to remove all the smoke from the box.

5. Using a special noise measurement tool, we tested the air purifier’s noise level at all speeds. We measured the noise level on the dBA scale.

6. Finally, we measured the power usage at all speeds using an energy meter, after which we calculated how much it would cost to use the device at a particular fan speed for one month. For reference, we used an energy price of $0.12 per kWh.

We tested the Coway Airmega 150 to evaluate its efficiency in capturing airborne particles.

In our tests, we typically place air purifiers in rooms of predefined sizes and measure particle levels before and after cleaning using a Temtop laser particle meter.

I also used the Airmega 150 in my own home (as I often do with many air purifiers). From that experience, I found it highly effective against airborne particles like dust and pollen, but less capable when it comes to neutralizing cooking odors.

It’s not terrible at odor removal, but it falls short compared to models like the Winix 5510 or the Levoit Vital 200S.

Testing in a 194 sq. ft. (18 m²) Room

In our test performed in a 194 sq. ft. (18 m²) room, the Coway Airmega 150 ran for 60 minutes at maximum speed and improved air quality by 94%, which is an excellent result.

It reduced PM2.5 levels from 110 to 7.1 µg/m³.

Compared to similar air purifiers (see the chart below), the Coway Airmega 150 ranks quite high.

For instance, the Winix A231 improved air quality by 95% in the same test, while the Blueair 511i Max achieved about 92%.

The Coway Airmega 150 has three fan speeds, and we measured noise levels at each one.

While I’d prefer more than three speeds, the Airmega 150 is still very well optimized for noise. At the lowest fan speed, it produces just 40.1 dBA, making it one of the quietest air purifiers we’ve tested.

For comparison, the Coway AP-1512HH produces 41.4 dBA at its lowest speed.

At maximum speed, the results are also impressive. The Airmega 150 produces only 59.2 dBA, placing it among the best-optimized devices for noise at full power.

In fact, as the chart shows, it outperforms every other model we compared. For example, the smaller Levoit Vital 100S produces a much louder 65.4 dBA at its highest setting.

Overall, I’d say the Coway Airmega 150 is one of the best-optimized air purifiers for noise.

This compact air purifier uses a 35W motor. With a CADR of 152.8 CFM (259.6 m³/h), its motor is well optimized, giving it a solid CADR-to-power ratio.

Running the Airmega 150 at maximum speed, 24 hours a day for a full month, would add only about $2.52 to your electricity bill, which is a very reasonable cost.

Compared to similar devices, the Airmega 150 falls somewhere in the middle. For instance, under the same conditions, the Bosch Air 2000 would cost just $1.73.

Beyond power consumption, filter replacement is another factor.

Fortunately, Coway’s filters last up to 12 months, and the overall cost isn’t too high. The only exception is the fibrous carbon filter, which may need to be replaced more frequently, slightly increasing long-term operating costs.

Overall, the Coway Airmega 150 is energy-efficient, affordable to maintain, and well optimized for everyday use.

Filtration Technology

The Coway Airmega 150 uses a three-stage filtration system consisting of a pre-filter, carbon filter, and True HEPA filter.

Unlike some other Coway models, it doesn’t include an ionizer, so it doesn’t produce ozone.

It’s also Energy Star certified, confirming the use of a True HEPA filter.

Coway states that its HyperCaptive Filtration System can remove 99.999% of particles as small as 0.01 microns.

Our tests confirmed the high quality of its filters, particularly in airborne particle removal. The only drawback is that it uses a fibrous filter coated with carbon as the filtration stage for odor neutralization (the EU version uses a pellet-based carbon filter).

Pre-filter

The Coway Airmega 150 uses a washable, permanent pre-filter as the first stage of filtration.

This filter traps large particles such as dust, lint, hair, and pet hair, helping to improve overall filtration and extend the life of the True HEPA filter.

It’s not only easy to clean but also simple to check its condition. Just pull the handle on top of the device labeled “Coway” upward and gently slide out the pre-filter—a very straightforward solution, in my opinion.

I recommend cleaning the pre-filter at least once a month, or more frequently if you live in a polluted area or share your home with pets.

Activated Carbon Filter

The second stage of filtration is an activated carbon filter designed to neutralize odors such as smoke, VOCs, and other common household contaminants.

One detail I especially like is the filter order. Since the carbon filter comes before the HEPA filter, it helps reduce particle buildup on the HEPA, prolonging its lifespan.

Keep in mind that the type of carbon filter varies by region: in the US, the Airmega 150 comes with a fibrous filter coated with carbon, while in the EU it’s equipped with a pellet-based carbon filter. Fortunately, some third-party brands also offer pellet-based replacements compatible with this model.

Overall, the carbon filter is well-positioned, but I believe the US version would benefit from switching to a pellet-based design, which would greatly improve odor neutralization performance.

True HEPA Filter

The final stage of filtration is the True HEPA filter, which is the most important filtration stage of the Coway Airmega 150.

Coway refers to it as the Green HEPA filter, but it is certified as a True HEPA filter. This means it captures 99.97% of airborne particles as small as 0.3 microns, including dust, pollen, smoke, and even some viruses and bacteria.

I believe the primary reason behind the Coway Airmega 150’s outstanding performance is its high-quality, highly efficient True HEPA filter.

Setup & Installation

In general, the Coway Airmega 150 is very easy to set up and requires no special preparation.

The filters come pre-installed, so the only thing you need to do is remove them from the device, take off the plastic wrap, and place them back inside. That’s it.

Next, position your Airmega 150 in the desired location, making sure it’s away from walls or objects that could block airflow.

Finally, plug it in and power it on.

Design

This model introduces some fresh design elements to Coway’s air purifier lineup.

It’s available in three colors: white, pink, and green. The build quality is solid and more than sufficient for a device of this type.

One thing I wish it had is carrying handles or slots, as moving it from room to room can be a bit inconvenient despite its compact size.

Overall, the Coway Airmega 150 is a modern, stylish air purifier that blends easily into almost any environment.

Controls and Indicators

The Coway Airmega 150 features touch controls located on the top left side of the unit.

The controls are well arranged and easy to use, but they’re not classic touch buttons, you need to press and hold rather than just tap.

While I like the simplicity, I do wish it also had the option of app-based control.

In addition to the controls, the Airmega 150 includes indicators for active features: fan speed, filter reset, and air quality status.

Airflow

The Coway Airmega 150 draws air in through the front panel, passes it through a three-stage filtration system, and releases clean air through the fan grilles on top.

Be sure not to block the airflow vents, as doing so could affect performance and potentially damage the device.

Size and Dimensions

The Coway Airmega 150 is a compact air purifier measuring 13.4 x 6.5 x 18.5 inches (34 x 16.5 x 47 cm) and weighing 12.1 lb (5.5 kg).

While it’s definitely on the smaller side, it’s not as tiny as models like the Coway Airmega 50.

What’s in the box?

When you buy the Coway Airmega 150, you will get 1x the device, 1x the pre-filter, 1x the True HEPA filter, 1x the Carbon filter, and a user manual.

Before using the device for the first time, I recommend reading my setup guide to ensure proper installation.

Features Overview

The Coway Airmega 150 is a minimalistic air purifier without advanced features.

It follows a similar design philosophy to the Blueair 511i. Both devices offer only the basics: filter reset indicators, a fan speed control button, and an air quality sensor/indicator.

I do wish the Airmega 150 had at least a timer function, which would be a practical addition, especially since this model doesn’t support app control.

Air Quality Sensor & Indicator

The Coway Airmega 150 has a built-in particle sensor located on the side of the unit.

It monitors air quality in real time, working together with the auto mode and the air quality indicator. The current air quality is displayed through an indicator light on top of the device, which changes color depending on conditions: blue (good), green (moderate), yellow (bad), and red (very bad).

While this system is simple, I would prefer it if it also displayed the actual PM2.5 value rather than just using color codes.

When auto mode is activated, the air purifier automatically adjusts fan speed based on detected air quality.

What sets this model apart, however, is the ability to adjust the sensor’s sensitivity. To do this, press and hold the power and fan speed buttons for two seconds, then use the fan speed button to switch between three sensitivity levels: 1 (high), 2 (standard), and 3 (low).

Overall, the option to fine-tune the sensor’s sensitivity is a standout feature that makes the Airmega 150 more versatile than many similar devices.

Warranty

The Coway Airmega 150 comes with a three-year limited warranty.

A nice detail is that you don’t need to register the device on Coway’s website—simply keep your order number or invoice as proof of purchase.

Room Coverage and CADR

The Coway Airmega 150 is a compact air purifier best suited for bedrooms, small offices, and similar spaces.

With a CADR of 152.8 CFM (259.6 m³/h), it’s recommended for rooms up to 237 sq. ft. (22 m²), a coverage nearly identical to that of popular models like the Levoit Core 300S and Vital 100S.

At the suggested room size, it cleans the air 4.8 times per hour. In a much larger 1,035 sq. ft. space, it would still manage one full air change per hour.

FAQ on Coway Airmega 150