All Miele vacuums in their S5 Series, when used
with the Active Certified HEPA
Exhaust Filter, join the others in their S500 and S600
series which represent the world's first ever HEPA certified vacuum
cleaner system. People especially concerned with indoor-air quality
will be pleased to know that the filtration system with the
Certified HEPA filter in the Miele S5 vacuums was tested
by the DMT Air Quality Test Institute and certified that it is in
compliance with the stringent EN 1822 standard.