4900-20 - iWave-R Air Ionization SystemNu Calgon 4900 20 iWave R Air Ionization System With technology installed in over 200,000 applications, iWave R is the world's first self cleaning, no maintenance needlepoint bi polar ionization generator designed specifically for treating air in residential duct A C systems. As the air flows past the iWave R, positive and negative ions actively treat the supply air, reducing certain bacteria and viruses in the coil and living space. The ionization