This new model was designed to meet the requirements of our customers to help alleviate allergy symptoms and/or environmental sensitivities. It is equipped with a 3M filtrete microfilter (standard) which assures .superior 5-stage filtration. As an option, it can be equipped with a Hepa Filter, for total filtration in healthcare environments or with carbon active filter cartridge to trap offensive odors.  The filtration efficiency tests done on Lindhaus vacuums by the independent laboratory IBR (USA) show the result of a Lindhaus sealed filtration system. All models of Lindhaus vacuums can also be fitted with an optional S-class HEPA filter, available from your dealer, for filtration of particles 0.3 microns or larger at an efficiency of % This allows you to acheive a higher level of filtration during the allergy seasons or when contaminants may be at a higher level in your home, such as after dusting.