Preparations for central air conditioning in the new building

Does the KfW55 status remain with a central air conditioning system? I’m afraid not.

So I don’t want to have a "climate device" hanging on the wall in the room itself. My understanding is that this is provided by a central air conditioning system.

Yes, that is correct. But there are also ceiling cassettes, etc., so nothing hangs on the wall either.

Is the same type of ducting used for the ventilation channels of the air conditioning system as for the central ventilation system, or are different dimensions required?

Yes, for effective cooling you need about four times the amount of air. Therefore, the ventilation ducts must be planned significantly larger.

Do you perhaps have a great link at hand where I can read detailed information? I only find marketing and high-level comparisons of the various types of air conditioning systems.

Links are not allowed here and this is really a matter for a knowledgeable planner. You can waste a lot of money here. So rather not a DIY matter.

Does the KfW55 status remain with a central air conditioning system? I’m afraid not.

Most likely it is actually the opposite and the status is even easier to achieve with an air conditioning system.

The air pumps for heating are also allowed and sometimes even preferred. An air conditioning system is no different.

Really? I only know that there are problems with split units, so I thought it would be similar with central ones. The question is probably also whether a developer will go along with so many extra requests. The additional cost will probably be significant, considering my experience with developers.

For a central system, you can expect to pay 30/40/50K and up. Depending on how big the house is.

I only know that there are problems with split units

What kind of problems are supposed to occur there?

The question is probably also whether a developer is willing to go along with so many extra requests. The additional cost will probably be quite high, judging by my experience with developers.

The developer had suggested that the preparations be taken into account accordingly during construction and that I find a company for the installation later. For cost reasons and because they probably don't feel like doing it. Now I wanted to first see what kind of preparations are actually necessary. Possibly whether one can first have the ducts installed and observe the actual heat development over 1-2 summers. You never get the new build condition again.

In principle, it is certainly a good idea, but if you want to prepare it, you need to know exactly what you want. For that, you should consult an appropriate planner!

As can be read in the thread about air conditioning on a south-facing slope, I am currently having a multi-split air conditioner retrofitted in an old building. If you want to pre-install it, you naturally need at least the corresponding channels for the cables to run through and, depending on the situation, also the installation possibility for ceiling cassettes, if you don't want a box on the wall.