Experiences with brine heat pump

I would just ask about that. Basically, it depends on the weight/area. Actually, I would have said that the heat pump can go on the screed, the storage tank on a pedestal.. with me, both are on the screed.

The problem with the heat pump on the screed is always, what to use to heat the screed when the heat pump is not yet installed on the screed?

Well, pour the screed, wait until it has hardened (about 10 days for normal cement screed), since it is only heated after about 3 weeks, you have plenty of time to put things there in between. It was the same for us in the basement (the heating system, but there is also screed there).

I apologize in advance for asking such a stupid question, but does the heat pump then stand on the bare screed and, for example, tiles are laid around it? Or am I thinking about this wrongly?

I first "concreted" a base for the heat pump, then tiled it beforehand and laid the screed around it. And next to it will be the hot water storage tank.

Should one do without a buffer tank in a brine heat pump and is a high-performance storage tank with two double smooth tube heat exchangers, for example from SHWT, practically sufficient? It is often written here in the forum that the screed should be regarded as a buffer and therefore no buffer tank is needed. So is the hot water storage tank with two heat exchangers sufficient? ;)