DO clean the concentrator surface with a damp cloth. Never use any cleaning products, wax, spray or furniture polish.
DO keep the concentrator at least 12-18 inches away from drapes, bedspreads, walls or any other items that may block the inlets.
DO put the concentrator in an adjacent room if it is too noisy.

DON'T use more than 50 feet of tubing.
DON'T use an extension cord with your concentrator.
DON'T plug the concentrator into an outlet that is being used to power other items.