Coway Airmega 400 HEPA Air Purifier
  • Coway Airmega 400 HEPA Air Purifier

    Monitor and improve indoor air quality with the Airmega 400 Smart Air Purifier by Coway. Two-stage, combination HEPA filtration provides allergy and asthma sufferers with clean, healthy air.


    This powerful air purifier works in spaces up to 1,560 square feet with 410 cubic feet per minute (CFM) of airflow.

    Real Time Monitoring

    Traditionally, allergy and asthma sufferers had to rely on blind faith to believe that their air purifier was working. Equipped with pollution monitoring capabilities, the Airmega 400 is designed to provide you with solid, real-time knowledge about your space’s air quality.

    • Air Quality Indicator: Located on the front of the unit, it’s constantly monitoring your air and providing instant feedback about your air quality.
    • Color Indicator: Quickly know your indoor air quality by looking at the color of the indicator light. It will change to 1 of 4 colors to indicate current conditions. Levels are Good (Blue), Moderate (Purple), Unhealthy (Pink), and Very Unhealthy (Red).

    Dual Sided HEPA Filtration

    Two-stage filtration ensures that not only are the large, easy-to-see pet hair and dust that can wreak havoc on allergies removed, but nearly invisible asthma and allergy triggers are too. Working together, this multi-stage filtration eliminates 99.97% of airborne allergens and particles down to 0.3 microns.

    • Pre-Filter: Traps larger particles like dust, pet hair, and other debris, allowing the Max2 filter to eliminate smaller, hard-to-see allergens.
    • Combined HEPA Filtration: The Green True HEPA Filter eliminates dust and allergens, and is combined with an Activated Carbon Filter for odor elimination.
    • Filters on Both Sides: Filters are located on each side the body to provide optimal cleaning performance.
    • Filter Life Notifications: Two filter indicator buttons are located on top of the unit, the Max2 and Pre-Wash indicators. Remaining filter life is displayed at 5 lit sections on the indicator (100%, 80%, 60%, 40%, 20%). When all lights around the button go out and the letters on the button light up, the filters are at 0% and need to be replaced.

    Automatic Operation

    Setting itself apart from other air purifiers, the Airmega 400 air purifier features the ultimate in hands off convenience. When engaged via the touch sensor control panel on the unit, Smart Mode will provide users with several features.

    • Automatic Fan Speed: Based on its determination of your current indoor air quality, the air purifier will automatically adjust to the correct fan speed for conditions.
    • Sleep Mode: The unit will automatically reduce power and noise when the onboard light sensor notices that the room is dark and that air quality has remained good for 3 minutes.
    • Eco Mode: When air qualities remain on the good level for more than 10 minutes, the fan will automatically shut off to conserve energy. If the air quality begins to decrease, the unit will restart automatically.

    Additional Features

    • Lightweight Design: This lightweight air purifier was manufactured to blend into any space. Instead of being a bulky, mechanical looking machine, Airmega by Coway created a smaller, modern addition to your room. 
    • Two Fan Speeds: Two fans makes sure that while noise level remains low, performance stays consistently high. Large air outlets further limits the amount on noise caused by air exiting the cleaner.
    • Touch Control Panel: There’s not any dials or manual controls. All functions can be handled via the onboard electronic touch control panel.
    • Timer: Using the button located on the control panel, the timer can be set so that the purifier turns off after an hour, 4 hours, or 8 hours.
    • Handles: Located on each side of the purifier’s body, built-in handles allow for easier transportation.
    • Filter Protection: Durable, plastic covers protect filters from damage.
    • Air Outlet Cover: Located on the top of the unit, it makes sure the fan remains protected.
    • Long Warranty: 5-year limited warranty on motor and electric parts.
    • Color Options: Available in your choice of fresh white or classic graphite.


    Easily remove allergens, asthma triggers, and odors from indoor spaces with the user-friendly Airmega 400 Air Purifier by Coway.

    What Customers Love

    • Real-Time Monitoring: Instantly know your indoor air quality with the onboard pollution sensor and indicator.
    • Automatic Mode: When place on AUTO mode, the unit automatically adjusts fan power, speeds, and brightness based on conditions.

    Things to Consider

    • Wi-Fi Control: If you like the large area cleaning abilities of this unit but want even more convenience, considered the Wi-Fi enabled Airmega 400s Air Purifier by Coway.



    • Return Policy

      To ensure your shopping satisfaction, a 30-Day Money-Back Guarantee on all products and a no-hassle return process.

      30-Day Money-Back Guarantee

      As stated in our 30-Day Money-Back Guarantee, if you are not satisfied with your purchase for any reason, simply return the product to us within 30 days and, upon approval, we will process your refund. The only cost you will incur is the cost of shipping your purchase back to us. To act on our guarantee policy, simply follow these steps:

      Login to our Customer Service Center and complete a return request within 30 days of your purchase or call us at 1-800-934-9194 to get a return authorization (RA) number.

      Once you secure a return authorization number, you will receive instructions for shipping the product back to us. You are responsible for the cost of return shipping.

      Send your product back to us within 2 weeks of receiving your return authorization number. The shipment must be postmarked within this timeframe.

      Upon receiving the product, we will inspect it to ensure that it is in good condition for resale, approve the return(s), and process your refund.

      Product Exchanges

      If you are not satisfied with your product and want to exchange it for a different one, please contact a Sylvane customer service representative by emailing Once your information is received and the exchange approved, we will send you an e-mail with an authorization number and complete instructions for your exchange.

      Policy Details and Exclusions

      All products must be returned undamaged with all original manuals, registration cards, accessories, boxes, outer cartons and packing materials. If a product is returned damaged or with missing items, we reserve the right to assess a restocking fee up to the full value of the purchase, depending on the items damaged or missing. Returns will not be accepted without a return authorization (RA) number. Once a return has been authorized and return instructions provided to the customer, the items must be returned postmarked within 2 weeks. Special freight deliveries (those items not delivered via UPS or FedEx) must be visually inspected at the time of delivery and any damage noted on the signed bill of lading or the delivery should be refused.

      Additional shipping charges due to customer special delivery requests (next-day delivery, international delivery, etc.) are not refundable. The first day of the 30-day return period is the day the customer receives item(s). If a delivery is refused or undeliverable to the address that is provided, the customer will be charged actual shipping and brokerage charges incurred on both outbound and return shipment.

      For items purchased with discounts or promotions, the refunded value for each returned item will be reduced to reflect the value of any free gift or discount included with your purchase. If included gifts are returned in concurrence with our return policy, the full amount of purchase will be refunded. 

      Please contact us with any questions you have about our return and exchange policies. We are more than happy to assist you.

      Holiday Return/Exchange Policy

      We know the holidays can be hectic. That’s why we’re extending our return and exchange period for purchases you make at Sylvane during the holiday season. All purchases made between November 15th and December 25th may be returned by January 10th or 30 days after your date of purchase – whichever is later.

      Want to make sure your item is shipped and received by Christmas? Review our shipping information. 

    • Filter-Monster Replacement HEPA Filter 2 pack

      Please call us to pre-order.

    $649.00 Regular Price
    $561.00Sale Price
    Exclusions apply