New features have been added to the aiR+ residential air duct cleaning system. The unit has 30 percent more vacuum power, the company says. The brush system rotates at 450 rpm to loosen the debris. As the debris is loosened, it is vacuumed up into the nozzle located behind the head of the brush. The removable pod design allows the system to go into previously inaccessible spaces. Features include dual HEPA filters, a collapsible handle, 12-inch diameter rear tires with traction, 4-inch industrial casters on the front of the unit, and a storage compartment.

Rotobrush, 801 Hanover Dr., Ste. 700, Grapevine, TX 76051; 800-535-3878;

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