Dyson. Engineered to help improve the quality of the air, this purifier is ideal for allergy sufferers. As the Dyson HP7A is a three-in-one model, you’ll get the best of hot, cool, and purified air all in one handy appliance. It detects, reports, and captures pollutants in a flash, cleaning your air without you lifting a finger. The activated carbon filter removes gases such as benzene and NO2 5, while the HEPA filter gets rid of 99.95% of ultrafine particles like allergens. So, whether you live in a polluted area or are sensitive to pollen, this purifier can help you breathe more easily. Thanks to jet axis control, two oscillators guide airflow through apertures at a 90-degree angle. Coupled with Air Multiplier technology, its circulation power draws even distant pollutants into the machine, projecting purified air throughout the room.