Dyson Pure HP01 Hot+Cool Purifying Heater+Fan in White/Silver. The Dyson Pure Hot + Cool purifying heater can be used for fast long-range even room heating and purification. Purifier fan and heater. In one. Fully sealed HEPA and activated carbon filter captures 99.97% of allergens and pollutants including pollen bacteria and pet dander. Air Multiplier technology amplifies surrounding air giving an uninterrupted stream of smooth yet powerful purified airflow. Oscillates to project and circulate purified air across the room. Certified asthma and allergy friendly by the Asthma and Allergy Foundation of America.