Because the water doesn’t sit idle for long lengths of time, like in a traditional tank, there is not as much likelihood of scaling within the heat exchanger. Then you step back in the water again. You’ll not have to think of your hot water again. Inadequate hot water might also be due to improper plumbing.
When it has to do with commercial hot water systems Rinnai has an assortment of unique options based on how great the demand will be. Tankless hot water systems can endure up to 20 decades.