Part # 990818. This is an original replacement part for a Renewaire EV Premium M and EV Premium L. The replacement part consists of the complete impeller assembly for the Return Air (RA) together as one part. This makes it very easy to replace, just remove the old damaged assembly and install the new one. The wiring is done through a quick connect cable terminal. Just make sure that the unit is unplugged before attempting to replace the blower assembly.