Best comprehensive SmartHome program

should the underfloor heating even be integrated into KNX at all?

Of course. It makes no sense to omit things when they can be integrated relatively easily. For whatever future purposes.

in our standard we get an ERR for every room (which I believe is even mandatory for KFW55)

They have been mandatory for almost all new buildings for roughly 20 years. But that does not change the fact that the ERR is a simple solution for the heating installer to hide errors and to build quickly. However, it only plays a limited role regarding the savings effect that it is supposed to promote or even enable.

I probably do not yet know the true potential of KNX

Yes, you are currently operating at the level of a Golf II. KNX would be a Tesla Model 3 in that comparison.

How can you set it so that the lights always turn on automatically as desired? That always depends on the situation and is often different and individual (I can't imagine any logic that could cover this)

By installing enough suitable sensors and actuators and paying attention to the residents’ habits, and you have to say goodbye to the idea that automation can cover 100% of all situations. We are still far from that. But 90% is possible and these then with 100% accuracy.

I still don’t store fixed times,

Fixed times are out of place in a modern house in the vast majority of situations (completely outdated). For shading, lighting, etc., everything is about sliding boundaries and events.

Fixed times are out of place (completely outdated) in a modern house in most situations. Both for shading, lighting, etc., these are all sliding boundaries and events.

You are right there, but that was not my intention. Sliding boundaries and events would still be "fixed" to certain conditions here, which I equated with "fixed times." And although these are of course sliding in a smart little house, the automation certainly cannot take into account the personal feelings of the inhabitants, which depending on the day, season, age, mood are at least just as sliding or confusingly mixed up ;)

Don’t get me wrong, I do not deny the possible added value and fascination of a truly "smart" house. But I am a good example myself that by far not everyone needs or wants the "smart patronization"... :)

I am myself a good example that by far not everyone needs or wants the "smart paternalism"... :)

The trick is precisely not to let the house patronize you.

The trick is precisely not to let the house patronize you.

No matter how smart a house may be, I maintain that being smarter is the way to go! :D. No algorithm or automation can keep up or recognize when I, for example, need light or consciously do not want it...

But let's leave it at that, I'm not claiming to be against it :) I just don't need it and am sure that in some cases I even feel disturbed and "patronized."

I talked to our electrician about Smart Home.

He doesn't want to do KNX at all.

He would recommend Free@Home or a wireless smart home.

The electrician doesn't want to install Free@Home centrally.
He says that then you have to run shutters, lamps star-shaped into the control cabinet and that would become very, very expensive.
High material cost for the cables and the large control cabinet and all the actuators.

His recommendation would be to do conventional electrical installation and then lay the bus cable along with it and work with the flush-mounted actuators of Free@Home.
According to the electrician, that should be the cheapest version of Free@Home by far.

A saving option from him would be that he could simply lay the bus cable everywhere and later on you can retrofit the bus smart home with Free@Home yourself.

My question would be whether this version of Free@Home is worthwhile at all?

Is it possibly possible to retrofit KNX yourself with this version?
Or are the actuators in the control cabinet absolutely mandatory for the KNX installation?

I am also wondering whether Free@Home in his version (flush-mounted actuators instead of REG actuators) would be worthwhile at all and whether we should simply retrofit a wireless smart home later.

The electrician does not want to mount Free@Home centrally.

Understandable, since it is basically KNX. In other words, a decentralized system.

High material cost for the cables and the large control cabinet and all the actuators.

Cables cost practically nothing in the entire project. But yes, the control cabinet and the actuators are of course not cheap, and of course the labor must also be paid for.

His recommendation would be to do conventional electrical installation and lay the bus cable along with it and work with the flush-mounted actuators from Free@Home. According to the electrician, this is supposed to be the cheapest version of Free@Home at all.

That is of course the most expensive variant and also the one that is more or less restricted, because you still have to rely on the outdated conventional wiring. Flush-mounted actuators are, due to their nature (calculated down to the channel price), simply more expensive than, for example, an 8-fold actuator in the control cabinet.

Is it possibly possible to retrofit KNX yourself with this variant? Or are the actuators in the control cabinet absolutely mandatory for the KNX installation?

Yes, you can, because free@home is basically KNX, it is just the cut-down version. But the wiring is the same. However, if you want to do it that way, then just skip the f@h actuators directly, why pay multiple times for everything?