LeBRUSH was not designed to replace vacuuming generally, but specifically to collect large amounts of hair before vacuuming more easily as well as the dust loosened up during the collecting hair from the carpets, fabrics. The idea is not to replace vacuum cleaning! The special design of LeBRUSH allows a side-suction of air and dust, whilst the pet hair is collected on the brush itself. It’s another way of cleaning, not a substitute for vacuuming.