Bionaire air purifiers have received the Seal of Approval from Allergy UK for several of their models. The charity's seal is given to products that can reduce or remove allergens from the indoor environment to help allergy sufferers. Bionaire purifiers use HEPA filters to remove 99% of airborne particles like dust, pollen, and smoke, and also contain baking soda to eliminate odors. An optional ionizer can further speed up particle removal from the air. Several Bionaire purifier models have received this seal for various regions including the UK, Europe, India, and others.