Dyson proves no loss of suction and pick up performance using results from IEC60312 Cl 2.2, 2.3, 2.8, 2.9, ASTM F2607, F608 and F558, and DTM755 - an independently conducted Dyson test. Dyson proves Dyson’s most advanced cleanerhead technology and engineered to pick up more dirt based on the results of IEC 60312 Cl 2.2, 2.3, 2.8, ASTM F2607, F608 and F558, and DTM 755- an independently conducted Dyson test. ASTHMA & ALLERGY FRIENDLY and the ASTHMA & ALLERGY FRIENDLY LOGO are Certification Marks and Trademarks of ALLERGY STANDARDS LIMITED. AAFA is a Registered Trademark of the ASTHMA AND ALLERGY FOUNDATION OF AMERICA.The following Dyson uprights on Dyson.com have been certified Asthma & Allergy Friendly™: DC14, DC17, DC22, DC23 Turbinehead, DC24, DC25 and DC28. The tools that come with Dyson vacuums are not yet certified as Asthma & Allergy Friendly™.