If you are replacing your central vacuum in a large home or business, this is a great choice for homes, vets, and hair salons.  The DuoVac Air 50 is a powerful hybrid system that can be used with or without a bag. Equipped with a bypass motor for great suction.  Components are covered by a True Lifetime Warranty. The Air 50 is one of the finest central vacuum systems that offers superior suction power, high filtration, and silent power.