Semi-detached new build, which technology to install?

  • Erstellt am 2020-04-12 22:50:52

Tego12

2020-04-22 16:53:15
  • #1


Agreement & additionally: And that also with less efficiency, because with less heating surface the house requires a higher supply temperature for the underfloor heating for the same heat demand (catastrophic for the efficiency of heat pumps). Any control costs you efficiency, plus the installation costs of the control. You can of course visualize it, but even then I don’t see an advantage, as a well-adjusted heat pump simply runs, and runs, and runs, monitoring is not necessary (OK, you can do it to show off to the neighbor).
 

Tego12

2020-04-22 17:06:30
  • #2
Additionally: For one case, I could reasonably imagine an ERR (I haven't done it myself, as the manual effort is manageable...): During the cooling period, I turn off the two underfloor heating circuits in the bathroom (the wall heating remains on), as passive cooling on tiles is not comfortable (the rest of the house has parquet, which is extremely pleasant when cooled). In winter, of course, the two bathroom circuits should be open again for heating, meaning I have to turn them back on. I do this directly at the heating manifold each time.
 

C.beckmann1986

2020-04-23 09:23:24
  • #3
That is already very very helpful, thank you very much For cost reasons, it will probably now be a wireless system, which I can gradually expand. Aside from the fact that I very likely would not use the full KNX bandwidth. Now I am wondering which system you have had the best experiences with so far. Opus sounds good, Homematic (IP) too. With which system do I have a larger bandwidth and can also integrate third-party providers like Philips hue, Xiaomi, or other providers? And what happens in the event of a server/Internet failure, can I still operate it in the house? At least via the switches etc? Currently, Unitymedia often fails here and Alexa then always reports that it cannot reach the lamps etc. That is super annoying. Sorry in advance for the many questions, but you have already helped me a lot
 

Mycraft

2020-04-23 09:52:12
  • #4
The question cannot be answered. Because the systems fundamentally differ and communication can be disturbed in many different ways just by the radio frequency, for example. Added to that is the support by the manufacturers and many other factors. Question 5 people, you get 10 opinions. Also, the size of houses and materials used play a not insignificant role in radio communication. This often turns out to be a naive calculation, because you first have to invest in conventional electrical installations, which actually become partially obsolete with a well-thought-out automation, and you create obstacles for yourself with the "opened" phase wires, but well, to each their own of course. Btw. KNX can also be very easily expanded and enlarged. I am currently, for example, converting my lights to HCL. and in the very next sentence you contradict yourself: But to answer your question, sooner or later all systems will be able to control Hue, etc., and there are overarching software solutions like Home Assistant, OpenHab and approximately 500 others which can bring many things under one roof. The only question is in what scope. Sometimes this feature works, sometimes that one doesn’t.
 

Tego12

2020-04-23 11:04:45
  • #5
Just use an open software like Openhab, IOBroker, etc., you can't get more flexibility than that. Personally, I only use Z-Z-Wave for the actuators because I like the concept, but basically you can mix however you want, that's the great thing. Whether individual manufacturers go bankrupt doesn't matter either, because the devices keep running, and if you ever have to replace them, you just take another manufacturer.

If you are in a typical single-family house residential area, I wouldn't worry about frequencies/radio. In my area, many use Z-Z-Wave, and I can't recall a situation where a radio signal didn't get through. In the relevant forums, you also find almost no problems in this regard. However, I don't know how it looks with other radio standards.

Costs: Openhab, IoBroker, etc., are free (for hardware a Raspberry PI, the cost is certainly <150€ here). Further costs per actuator are about 10-50 €, sensors are available in all price ranges.. A friend of mine has done a lot with Shellys, costs basically nothing, and everything works perfectly.

However, you should be a bit IT-savvy, otherwise it’s no fun. Openhab (which I use) is actually quite simple, but like with KNX you have to get familiar with it a bit. Once everything is set up, it runs without further intervention. There are large communities, meaning you can address any questions very quickly, and find answers to 99% of the questions that come up quickly.
 

bauenmk2020

2020-04-23 12:24:41
  • #6
I have planned radio actuators from eltako for blinds and lights. They fit in deep flush-mounted boxes. Protocol Enocean. I did not make sockets switchable because I find it unsmart if, for example, a socket is switched off and an external hard drive is connected to it. I will update gradually (e.g., rotary handles with Tippfunk/Enocean). No stress. Conventional electrical wiring is not the end of the world. As long as you do not use systems with closed source/cloud-based connectivity, you will also be able to implement meaningful automation and comfort options over a long period of time.
 

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