ᐅ New Semi-Detached House – Is Investing an Extra $10,000 Worthwhile for a Smart Home?

Created on: 17 Jan 2021 17:11
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Giggz123
Hello everyone,

we are currently planning the construction of our half of a semi-detached house. Initially, I was considering a KNX solution for home automation, but the reality as homebuilders is catching up with us, and the budget is getting tighter. Due to the plot, we are tied to a construction company that handles all trades (including electrical) with their own staff. The contract is expected to be signed soon.

The construction company seems to have limited expertise regarding smart home systems, so I’m now considering how to best proceed.

At the moment, the plan is for conventional electrical work (about 8,000 EUR), plus additional services for almost 4,000 EUR net to install a LAN connection in every room and reach a total of 100 power outlets and 20 lighting points (there may still be some missing).

We still have about 10,000 EUR left, so the entire (smart) electrical installation can cost around 22,000 EUR. We have also planned 13 roller shutters / blinds, which — for now — will have conventional electrical control.

Requirements - Must Have:
  • Lighting:
    • Central control of lights (preferably all, if necessary by floor, room, or selected areas); partial dimming
  • Shading:
    • Central control of roller shutters / blinds with automated shading
  • Power:
    • Make approximately 10+ power outlets switchable

Nice to Have:
  • Avoid residual current devices (RCDs) if justifiable via smart home (I do not intend to actively control heating)
  • Connection to controlled residential ventilation system
  • Integration of voice control
  • Window contacts
  • Visualization
  • Presence detectors
  • Sonos integration
  • Intercom system integration (Doorbird, Busch Jäger Welcome)
  • Alarm system functionality (via presence detectors / sensors, possibly also a proprietary system, e.g. Busch Secure@Home)

Options:
1. Conventional wiring plus standalone radio solutions (this is what we currently have in the rental apartment: Somfy roller shutters, HUE lights, etc.), integrated into a common visualization platform (such as ioBroker and others)
2. Proprietary system, currently the favorite is probably Free@Home with central actuators, allowing a possible later switch to KNX if needed. Alternatively, Homematic Wired might be an option.
3a. KNX with the must-haves and preparation (cabling) for nice-to-haves / as much as possible
3b. KNX with must-haves, nice-to-haves via radio solutions / gateways, integrated into a common visualization (ioBroker and others)

I’ve read a lot about this but somehow keep going in circles...

Do you have any advice on how to best approach this now? Should I create a room schedule and request various offers for options 2 and 3? Should I look for a qualified system integrator / smart home expert who can offer both options 2 and 3? Or is this basically unrealistic with the given budget, and I should focus on option 1?

Although construction doesn’t start until summer, if I want to try to contract the electrical trade elsewhere, I only have about 4 weeks left.

I am not completely ruling out KNX and could also imagine doing some work myself. Has anyone used a solution where they hired a planner, had the control cabinet assembled and shipped, then had the construction company’s electrician install all the wiring, and finally configured everything themselves?

Many thanks in advance!
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NoggerLoger
9 Apr 2021 19:32
Instead of a room controller, I would simply install a push button with a display at 140cm (55 inches) height. I use the MDT Smart 55 push button with temperature and humidity sensors. You can then use it for various functions. Below it, at switch height, a standard push button for blinds or dimming, etc.
Mycraft9 Apr 2021 20:00
It’s all a matter of personal preference... we use almost no buttons in the house. Everything should ideally regulate and control itself automatically.

In my opinion, this is also the purpose of a smart home, or an automated or intelligent home—whatever you want to call it—to have as little visible technology as possible and as few manual actions required as possible. KNX is very well suited to achieve these goals.
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NoggerLoger
9 Apr 2021 20:08
The plan is correct, but I wanted to have a fallback option—old habits die hard. That’s why I also included green wiring and empty conduits in all possible locations. We’ll see how it goes with the automation and a cat.
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RE-1407
9 Apr 2021 20:15
Mycraft schrieb:

So each room gets 2-3 of these installed? If I remember correctly, you mentioned a total of only about 145 m2 (1,560 sq ft)?
Each lockable room (children’s bedrooms, bathrooms, etc.) gets one, while open areas (living room, dining room, kitchen, hallways) have a bit more overall.
That’s how you quickly reach that number.
Mycraft9 Apr 2021 20:15
@NoggerLoger
We have two cats. It works well.
A
AllThumbs
9 Apr 2021 20:18
NoggerLoger schrieb:

Instead of a room controller, I would simply put a push button with a display at 140cm (55 inches) height. I use the MDT Smart 55 push button with temperature and humidity sensors. You can use it for all sorts of functions. Below that, at switch height, I would place a standard push button for blinds or dimming, etc.

Hmm, I actually find it quite appealing to have just one control unit and not have to stack multiple push buttons or similar devices on top of each other.
Otherwise, I agree with you. A display isn’t absolutely necessary, but it makes you very flexible. Without a display, I would probably have the rocker switches laser-engraved. However, that requires excellent planning and is also more expensive.