Air Purifiers for Allergies Designed for Calmer Breathing at Home
Pollen, dust mite debris, pet dander, mould spores — the things that trigger sneezing, blocked noses, and broken sleep are usually invisible. Coway air purifiers with GreenHEPA™ filtration capture 99.999% of these allergens down to 0.01 microns.
Independently certified by ECARF · Trusted by 18 million+ homes worldwide.
Find Your Air PurifierFind the Right Air Purifier for Your Allergies
Every Coway model uses our proprietary GreenHEPA™ filtration. Match the unit to your room size.
For meaningful symptom relief, choose a unit rated for 1.5–2× your room's floor area.
Why Standard HEPA Falls Short for Allergy Sufferers
Most air purifiers claim "HEPA filtration." For allergens, the size threshold is what really matters.
Independently certified by ECARF and the British Allergy Foundation.
How an Air Purifier Reduces Allergy Symptoms at Home
Even in a clean home, microscopic allergens stay suspended in indoor air for hours: pollen tracked in on clothes, dust mite faecal particles disturbed by walking on carpet, pet dander shed continuously.
An air purifier draws room air continuously through a HEPA-grade filter, lowering airborne allergen concentration over time.
You spend 7–9 hours each night with your face close to bedding — a major source of dust mite allergen.
The UK Allergy Calendar
Indoor allergens persist year-round. Outdoor pollen comes in waves.
What Allergy Sufferers Say
Real reviews from real customers across the UK
"We have two cats and my partner is mildly allergic. Since installing this in the living room, his reactions have dropped to almost nothing. Even running in the bedroom, it has never disturbed our sleep."
"My morning sneezing fits have almost completely stopped. In a room where I previously had strong reactions, I now experience no issues at all. The motor is impressively quiet — I forget it's running."
"My hay fever symptoms improved dramatically through pollen season, and I noticed less dust accumulation in the room. It made a real difference to my sleep — fewer middle-of-the-night blocked nose episodes."
Allergy & Air Purifier FAQs
Everything you need to know before choosing
Yes. Multiple clinical studies show HEPA-grade air purifiers measurably reduce airborne allergens — including tree and grass pollen, dust mite faecal particles, pet dander proteins (Fel d 1, Can f 1), and mould spores. Coway's GreenHEPA™ captures 99.999% of particles down to 0.01 microns and is independently certified by ECARF as suitable for allergy sufferers.
Yes. Allergens enter the home continuously — through open windows, on clothing, with pets, and stirred up by daily activity. Running the purifier 24/7 keeps allergen concentration consistently low. Coway models are designed for continuous operation, and the Airmega 100 costs less than 3p per day to run on eco mode.
ECARF (European Centre for Allergy Research Foundation) is an independent Berlin-based institution that certifies products for allergy sufferers. Testing involves 15 international scientists measuring particle removal, noise output, and ozone emissions in climate chambers. It is one of Europe's most respected allergy certifications.
Hay fever is triggered mainly by grass pollen between May and July, and tree pollen earlier in spring. The best air purifier for hay fever runs continuously and is quiet enough to use overnight. The Coway Airmega 150 is ECARF-certified with a 20 dB sleep mode. For larger areas, the Airmega Mighty carries dual certification from ECARF and the British Allergy Foundation.
Coway: 35 Years of Cleaner Air
Since 1989, one mission: hospital-grade air purification for the home.