ᐅ Instantaneous water heater despite gas central heating?

Hello everyone,

I have an old multi-family house where one apartment is now vacant due to a tenant change. The apartment was rented out for over 20 years, so I didn't have access before. It has come to my attention that there is an instant water heater installed in the bathroom, even though there is a gas central heating system that also provides hot water. Each apartment also has its own hot water meter, so I find it surprising that the apartment has an instant water heater that activates whenever water is used in the bathroom.

Does anyone have an idea why an instant water heater would be installed in addition to the central heating hot water system? I would like to understand this before renting out the apartment again.

Best regards

nagner99 schrieb:

Does anyone have an idea why an instantaneous water heater would be installed in addition to hot water supplied via the central heating system? I’d like to have this clarified before I rent out the apartment again.

There could be a thousand reasons. Leftover equipment, renovation where installing hot water pipes wasn’t possible, bathroom added later, hot water pipe to the apartment is blocked, and so on.

The tenant may have also found the waiting time for hot water too long, or it could be (in the case of a long, sporadically used pipe) a measure against legionella bacteria (not that this couldn’t be solved in other ways).

This is not uncommon. The apartment I lived in at the time, as well as all the kitchens above and below, were far from the central hot water system, so all kitchens were equipped with an instantaneous water heater. This was also planned that way. Other reasons have already been mentioned.