Ingersoll Rand Nirvana oil-free air compressors, with a matching variable speed inverter and hybrid permanent magnet (HPM) motor, provide unparalleled energy efficiency at all speeds along with superb reliability. They deliver class 0 certified 100% oil-free air for the most critical applications. There are no motor bearings, pulleys, belts, couplings or motor shaft seals to wear out, leak, or need replacing. Nirvana will lower your operating costs with its dynamic efficiency.