Yes. It is important to clean and descale your unit at least every 6 months to maintain its flawless performance. You can use our Eccotemp EZ Flush Descaler Kit. This will get rid of any water scale, lime, or rust deposit buildup in virtually any piece of water based equipment. Your water heater will run the risk of overheating and can deteriorate its effectiveness if you do not keep up with flushing your water heater.