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A hand stirs a dish cooking in a pot over a stove. Light smoke emits from the dish. The labels beside the image read “Harmful Gases,” “Odor,” “Food Smells.”

How odors affect your mood (and how air purifiers can help)

Wake up and smell the science

Whether it’s flowers in bloom, the aroma of morning coffee or smoke wafting through the air, scents can affect your mood—and in a surprising number of ways. “There is now extensive evidence that odors can overtly or subliminally modulate mood and emotion.” – Ioannis Kontaris, Brett S. East and Donald A. Wilson, Frontiers in Behavioral Science.

According to Frontiers in Behavioral Science, five minutes with an unpleasant odor can induce a negative mood in someone, while five minutes with a pleasant odor can have the opposite effect. Scents can go as far as to make you feel more alert, relax you when you’re stressed and even spark latent memories.

How scents affect your mood

The connection between smell and emotion has prompted many scientists to study olfactory psychology and the limbic system, both of which explain why smell is attached to your feelings, including emotional nudges from your past.

According to articles from both The Harvard Gazette and Healthline Media’s Greatist, your brain’s olfactory bulb is responsible for linking scent with what you’ve experienced and sending the feelings you have about those experiences to your limbic system.

“This explains why the smell of rubbing alcohol might remind someone of an unpleasant doctor’s visit, or the smell of freshly baked cookies conjures up an image of Grandma.” – Greatist.

Using air purifiers to remove unwanted odors

Part of influencing how you feel is by controlling those odors, and as the researchers of Frontiers will tell you, indoor air quality is key. “Given that humans spend 90% of their time indoors, indoor air quality can be an important factor for mood and health.” By removing undesirable smells from the equation, you can help control how you’re affected.

The Green True HEPA™ filters of Coway Airmega air purifiers can provide you with that control, by capturing and reducing up to 99.999% of particles 0.01 microns in the air*—including harmful gasses, VOCs and (you guessed it) odors. In particular, the Coway Airmega 400S and 300S purifiers connect to the Coway IoCare app, which offers real-time monitoring of air quality for both indoor and outdoor spaces.

Ready to take control of your mood? Shop the Coway Airmega line of air purifiers today.




*Coway air purifiers have been tested according to the Korea Air Cleaning Association standard on a particle size of below 0.01㎛ and on maximum fan speed in normal room temperature and humidity conditions. According to Airmega 250's test report, 99.999% of 0.01㎛ particles are removed within 12 minutes.  (Tested with Airmega AP-1216L, AP-1512HH, 150, 300, 250, 400)


1Coway air purifiers have been proven to trap dust, pollen, dander, viruses and bacteria in the air based on KCL (Korea Conformity Laboratories) testing.They have been tested in a 30㎥ size chamber according to the Korea Air Cleaning Association standard (SPS-KACA 002-132:2022 Modified) to measure the 0.01㎛ size of particle removal rate. It was tested on maximum airflow speed in normal room temperature and humidity conditions. The performance may vary in the actual living environment of customers.
→ Tested with Airmega Aim, 100, 150, 160, AP-1216L, AP-1512HH, AP-1512HHS, 200M, Icon, IconS, 230, 240, 250, 250 Art, 250S, 300, 300S, 400, 400S, ProX

299.97% of viruses, bacteria, fungi and pollen were verified to be removed from the air for Coway air purifiers which have Green True HEPA™ filter applied based on the Japan Food Research Laboratories(JFRL) testing according to JEM 1467 standard.
→ Tested with Coway Airmega AP-1512HH, AP-1512HHS, 250, 250 Art, 250S, 300, 300S, 400, 400S
→ All tested by JFRL and received above result within below time.

All tested by JFRL and received above result within below time.

- Virus: Tested with Escherichia coli phage ΦX174 NBRC 103405, 60 minutes
- Bacteria: Tested with Staphylococcus epidermidis NBRC 12993, 60 minutes
- Fungi/Mold: Tested with Penicillium citrinum NBRC 6352, 60 minutes
- Pollen: Tested with Cedar Pollen extract, 60 minutes

3Aerosol test conducted in a Biosafety level 3 laboratory with two Coway air purifier models, Coway Airmega 250 and 400 for removal of SARS-CoV-2 Aerosol by US based MRI Global, a not-for-profit laboratory and partner of US Department of Defense. The test was conducted in a 13.1ft3 chamber. Virus was aerosolized for 15 minutes and the product was turned on high for 2 minutes. Result showed each product effectively removed over 99.98% of the SARS-CoV-2 in 2 minutes. This is a result from a laboratory experiment condition and result may vary in different conditions. This result does not imply it kills SARS-CoV-2 or prevents the transmission of Covid-19. Coway Airmega 250S and 400S are identical to the tested models and has equal performance with an additional mobile connectivity function.

4The concentration of ammonia, acetaldehyde and acetic acid were proven to be removed within 30 minutes by FCG Research Institute, Inc. Human Life Science Lab. It is not a demonstration result in the actual use space. Not all odors and gases may be supported. → Tested with Coway Airmega 150, 160, AP-1512HH, AP-1512HHS, 400, 400S

5The coverage area of the air purifier is based on an area where the air cleaner can make two air changes per hour (ACPH). An air change per hour translates to how many times an air purifier can clean an area, assuming the height of a ceiling to be 8 ft, in one hour. Therefore ** means two air changes per hour means that the cleaner can clean the area once every 30 minutes and * means air changes per hour means that the air purifier can clean the area once every 60 minutes.

10Terms and conditions apply. Discounts, including promotions, coupons, bundle discount and subscription discount, cannot be stacked on top of other coupons. During promotional periods, discount codes will not be able to be applied to orders. Promo codes may apply to products only—filters, accessories, and new products within 3 months of the release date are not included.