A circulation pump for hot water. Yes or No?

With good planning in a single-family house, not necessary. With poor planning or very large houses, certainly worth considering.

Read in the pink forum about it (all the experts are in the building technology section), there it is quite consistently advised against due to increased risk of legionella and energy wastage (heat losses are significantly more than the little electricity consumption of the pump). It doesn’t make you poor, but many people also pay attention to a certain level of environmental friendliness when building a house. With good planning (short distances and properly sized pipes), the water also gets warm very quickly even without it.

It is definitely a circulation pump. The pipe is already installed because I was not sure until the "Putztermin" whether I wanted such a circulation pump or not. That is why our plumber laid the pipe directly. Now I still have time until the pouring to tell him whether he should connect it or not...

He said the pump has an integrated timer.

Well, if the pipe is already installed, I would definitely do it. I also wonder how this is supposed to work hygienically. The circulation is connected to the hot water pipe, normally at the last consumer. If no pump is installed and the network is filled, the water will remain in the pipe permanently. I wouldn’t recommend that...

I feel the same way... When the pump is off, it takes ages for warm water to come in our kitchen... sometimes 4-5 liters go to waste for nothing. When it’s on, we actually have warm water everywhere in the house right away. I have it controlled by a timer switch as well. So during regular working hours on weekdays, it’s off.

We only skipped it in the downstairs guest bathroom... because the bathroom is right next to the utility room (4-5 meters of piping)... and it still takes about 20 seconds for warm water to come. I find that really annoying... sounds like little, but when you picture the sink and turn on the tap, you realize how long it can actually be.

I also wonder how this is supposed to work hygienically. The circulation is connected to the hot water line, normally at the last consumer.
If no pump is installed and the system is filled, the water will remain in the pipe permanently. I wouldn't recommend that...

Please also read the last post carefully...

Now I still have time until the screed to tell him whether he should connect it or not...

We only skipped it in the downstairs guest bathroom... because the bathroom is located right next to the utility room (4-5 meter pipe)... and it definitely takes about 20 seconds for hot water to arrive there

Are you sure? Even the farthest fixture in our house doesn't need that long... The somewhat nearby guest WC about 3 seconds.... That's what I mean by proper planning... If it's done poorly, it has to be compensated. I wouldn't accept 20 seconds of waiting time either.