When you look at a standard, conventional tank water heater, it’s probably clear why it would need regular maintenance. It’s large, it has a number of components to it in order for it to work, and it’s metal full of water–two things that don’t typically go together without rust and corrosion. Tankless systems are so different though, right? They don’t hold water in them–instead, they heat water on demand when a tap or a plumbing appliance requires it. So you don’t have to worry about rust or corrosion as much. They don’t have as many components either, so their repair needs are limited.
So, why does your tankless water heater need maintenance? Well, it’s due to a little something called scaling, which actually impacts all types of water heaters, not just conventional tank systems.