Waiting time after commissioning heat pump

Hello,

here is a somewhat different question, as I am not yet a builder but a tenant:

We are planning our move into a newly built semi-detached house as the first tenants. It is a prefabricated house with an air-to-water heat pump and underfloor heating.
Originally, we were supposed to move in on November 1st, but the heat pump was not yet available.
Everything else is already installed, floors etc.

Now the heat pump has been delivered and installed, and tomorrow someone from the manufacturer will come to set it up and put it into operation.

The landlord now wants to hand over the house to us the day after that. We also have to move out of the current house and are thus under considerable pressure.
An acquaintance said it is complete nonsense that we can move in immediately after commissioning because the pump must run for several days first. Furthermore, the house, especially the screed, should first dry out completely, and without the heat pump this could not have happened so far. He sees the floors already being in place as a problem with possible mold formation.

Could you please give us advice – is there probably a problem here?

Thank you in advance.

When the heating is installed and working, you can move in immediately.
A hygrometer helps you to ventilate the remaining moisture.
Besides the residual moisture, you as residents (breathing air) are also a cause of moisture.

When the heat pump is installed and running, it gets warm. This can certainly take a day if everything has cooled down to a few degrees, but there is no need to wait for anything.

The screed can only dry properly if there is no covering on it yet, the heat pump / heating doesn't matter at first. Screeds have dried without underfloor heating and heat pumps over the past decades. Nowadays, screed drying is usually carried out with the support of the heating simply because it goes faster and the screed becomes ready for covering sooner. This can also be done by temporarily connecting a mobile heating device (usually electric). If the screed is already covered with flooring, the screed is dry. If it is not yet dry and the covering is on, you can notice it by peeling parquet or tiles, etc.

Therefore: move in!

Until you have moved in, go air out once daily and check the thermometer/hygrometer

Residual moisture from construction lasts 1-2 winters. But that is completely normal and you don’t need to worry. Move in as soon as it suits you.

Thank you very much in advance for your answers. My impression so far is that savings were made at every corner of the house, combined with slight cluelessness on the part of the builder. Therefore, I am very cautious. The concern regarding the screed was mainly that the floors might have been installed prematurely. We saw the house in August/September, and there was no screed yet; in October, the floor was already in place. We can no longer determine whether it had dried properly. By the way, the floor is laminate and also laid rather unevenly, I would say as a layperson. Put differently: If there should be a problem, how do we detect it? Hygrometer constantly above a certain value? Incidentally, room ventilations are installed, not controlled residential ventilation, but individual ventilators per room.