03-24-2013, 04:05 AM
The sterilight UV system only requires annual maintenance. While the effectiveness drops as the bulbs age, the unit includes a computer readout that tells you exactly how many days until you need to change the bulb and an audible alarm goes off if the UV output is insufficient to sterilize the water. The whole-house unit only uses 48 watts under full flow and then drops to nearly no current draw when the water isn't moving.