Allergy approved vaccum cleaners are usually made with HEPA (High Efficiency Particulate Air) air filters that reduce the amount of airborn allergens dispersed during vacuuming. HEPA filters use activated carbon and zeolite to remove gases, odors, chemicals, toxins and vapors. There are two basic styles, upright and canister. The upright HEPA vacuum stands on its own as a single unit, with some having an attachment hose to clean hard to reach corners. However, upright vaccums tend to leak more dusty air back into the room. HEPA canister vaccum cleaners are more effective and have a compact design that can be rolled along as you vaccum. They are more powerful because they have a separate motor. With regular vacuuming and proper maintainance of the HEPA vacuum cleaner and filters, it would be easier to manage asthma-causing allergens in the home.