The Air Storm HEPA vacuum cleaner {MADE IN THE USA} is totally sealed to prevent dust and allergen leakage back into the air while vacuuming for greatly improved indoor quality also known as IAQ. The Air Storm HEPA vacuum cleaners are far more powerful then all other vacuum cleaner brands, including the MG2 Tristar! It REALLY out performs & out cleans all other HEPA vacuum cleaners Including all models of TriStar, Miracle Mate, Miele, Electrolux, Dyson, Nilfisk, Compact, ORECK, HALO including the Rainbow water vacuum cleaners.