If you have allergies and want to keep the air free of allergens in your home, an air purifier will help you a lot. The ideal air purifier would be one that will effectively clean the air and still fit into your home’s decor. Coway Airmega 300 air purifier is a blend of performance and aesthetics, which offers some exciting features. In this article, we review the Coway Airmega 300 air purifier, including its pros, cons, and a comparison with the S and 400 models.
Differences between the 300, 400, and the S models:
The main difference between Coway 300 and 400 is the air delivery rate and size. The 400 model covers larger spaces than the 300 model. Also, the 400 model comes with two color variants, while the 300 model has only one color variant.
On the other hand, the S models (300S and 400s) can connect to a Wi-Fi network, and you can control and monitor the air purifier from the smartphone. Also, the S models have a built-in ambient light sensor to activate the sleep mode automatically.
Comparison table >>> Coway Airmega 300 vs. 300S vs. 400 vs. 400S
Coway Airmega 300 Specifications:
Let’s take a look at its specs below:
Filtration: Two sets of permanent Pre-filter. Two sets of HEPA and activated carbon filter package.
HEPA class: True HEPA
Filter life: 12 months
Maximum CADR: 335 cubic feet per minute (cfm)
Sensors: Particle sensor PM 2.5 (S models have an ambient light sensor)
Room Coverage: 1256 sq ft with 2 air changes per hour or 500 sq ft with 5 air changes per hour
Number of manual fan speed: 3
Automatic mode: Yes
Size: 21.2″H x 13.6″W x 13.6″D
Device weight: 21.4 lbs
Rated power: 57 W
Noise Level: 22 – 52 dB
Voltage: 110-120 V AC 60 Hz
- Coway Airmega 300 room air purifier is designed to accommodate room sizes up to 1,256 square feet and cleans the air at least two times...
- Coway Airmega Max2 filter – combined activated carbon and True HEPA filter – captures and reduces up to 99.97% of particles 0.3...
- Coway Airmega’s pollution sensor communicates indoor air quality in real-time. The brightly colored LED ring lets you know how clean...
- Coway Airmega has five fan modes: Smart, Sleep, Low, Medium and High. The noise level is nearly silent at lower speeds and the max...
- Smart mode with three settings, Coway Airmega smart air purifier adapts to its surroundings. Fan speed automatically adjusts based on...
In-depth Review of Coway Airmega 300:
Coway Airmega 300 air purifier is a very premium looking air purifier in the market. It’s square-shaped, and it takes air from both sides. The air inlet grills are magnetically locked, which is very convenient for filter replacement.
It features an auto fan adjust mode based on the surrounding air quality, sleep mode, and eco mode. The primary filter is a true HEPA grade filter to capture particulate pollutants. It also has an activated carbon filter layer for removing odors.
Multi-stage Filtration: Coway Airmega 300 comes with a multi 3 stage physical air filters. The first stage has a permanent and washable net-type filter. This filter blocks larger pollutants (PM10) such as pet fur, hair, lines, and dust. It also protects the primary filter from getting clogged.
After the permanent pre-filter, the air purifier has a combined HEPA and activated carbon filter, which they called Max2 filter. The HEPA filter can trap 99.97% of tiny particles such as dust, mold spores, smoke droplets, and others as small as 0.3 microns.
The honeycomb structured carbon pellets filled odor and gas filter can absorb household odors and VOCs. Coway claimed, it can remove 96% of multiple VOCs and gases.
The unit has no optional ionizer, UV-C light, or other electronic air filters. For this reason, it becomes a 100% ozone-free air purifier that is safe for everyone.
Check out our review >>> The 7 Best Ozone-free Air Purifiers.
Coway Airmega 300 also features a filter replacement indicator. The Max2 filter lasts almost a year.
High Clean Air Delivery Rate: Coway Airmega 300 has an impressive Clean Air Delivery Rate (CADR) of 335 cfm. With this powerful CADR, it can clean a large 1256 square feet room twice per hour or a 500 square feet room five times an hour. With the airflow rate, the air purifier is suitable for removing smokes or heavy contamination where faster air cleaning is needed.
The air purifier has a dual air inlet system, which makes it a high cfm air purifier. However, the CADR rating is tested on their own and not certified by AHAM.
Air Quality Sensor & Display: Coway Airmega 300 comes with a built-in air quality sensor, which detects particulates level (PM 2.5) in the air. It also shows the real-time air quality status as a colored LED indicator. It determines the air as Good, Moderate, Unhealthy, and Very Unhealthy with Blue, Green, Amber, and Red lights, respectively.
Convenient Control: Coway Airmega 300 has a smart mode feature. In this mode, the purifier detects pollutants in the air and adjusts the fan speed automatically. Besides, it comes with three manual fan speed mode: low, medium, and high.
The smart mode also has three options for you to select- Auto, Eco, and Sleep mode. It also features three timer modes: 1, 4 & 8 hours.
Low Noise Profile: The noise produced from this air purifier is surprisingly low. At lowest, it is only 22dB, below the whisper level. On the highest fan speed, the noise is also low, only 52dB. Thus, it can help you with overnight operation on the highest settings, especially on smoky days, when you need to run air purifiers at the most top speed. The sleep mode is where this purifier outshines the others.
Check out our review >>> The 7 Best Quiet Air Purifiers.
Suitable Room Size for Coway Airmega 300:
If you have higher ceilings, then use our Air Changes per Hour Calculator to calculate the suitable room size.
Coway Airmega 300 Operating Costs:
Annual Filter Replacement: ~ $60 for the Max2 filter pair, 12 months usage (check availability & filter price).
Monthly Energy Consumption: ~ $3.7 (based on 12 cents per kWh and 18 hours use on turbo speed per day). Use our Energy Usage Calculator to find out the bill based on your usage and the local energy rate.
Pros & Cons:
Coway Airmega 300 vs. 300S vs. 400 vs. 400S:
Questions and Answers
Q. Does Coway Airmega produce ozone?
A. No, it is a 100% ozone-free air purifier. It doesn’t have any electronic filtrations like an ionizer, UV, plasma, PCO, or ESP. The air purifier has only physical filters.
Q. When should I need to replace the filters?
A. The Max2 filters (HEPA and carbon combo) needs to be replaced once every year. Filter life depends on two things: daily usage time and the quality of the indoor air. Also, it has a filter replacement indicator.
Q. Can I wash the filters?
A. Only permanent pre-filters are dishwashable. The Max2 filters are not washable, but you can vacuum its surface softly to remove dust.
Coway Airmega 300 comes with a wide array of features for convenient use. The beautiful and modern aesthetics, high air delivery with dual air inlet, super-efficient filters, easy controls make it one of the best indoor ozone-free HEPA air purifier.
We suggest you select the Coway Airmega 300 if the CADR covers your room with your preferred air exchange rate. The 400 models come with two color options for which is aesthetically great, an extra 26 CFM of airflow rate. We don’t suggest to select the S models (300S and 400S) as their native app has some issues, and it got poor ratings on both android and iOS app stores.