Because of some weather conditions, the water can become harder than the usual. And Tankless water heaters are highly affected by poor water quality.
Now that you know the importance of maintenance, it is important that you know about the number one cause of tankless water heater failure...
Rinnai and Noritz are the 2 in my list.
I've been with them for many years now and I haven't heard any issue from my clients. In fact, If you get the most appropriate system installed, you can shave up to 55% off your current energy bills.