Based on Real-World Experience
After many years working with KNX systems in high-end residential projects across Dubai and the UAE, our team has encountered this question frequently:
Should we consolidate all room controls – air conditioning, lighting, and curtains – into one multifunctional smart switch, or is it better to separate them?
Thanks to the flexibility of KNX and the wide range of advanced smart room controllers such as the DORA Room Controller by MM Electro, combining multiple functions into one sleek panel is entirely possible. However, from a practical and user-experience perspective, things aren’t always so straightforward – especially in villas.
The Case for a Single Smart Switch
Modern KNX keypads and room controllers offer impressive capabilities. With elegant glass touch panels or capacitive buttons, users can control:
Fan speed
Cooling/heating mode
Lighting scenes
Curtain/blind movements
Custom scenarios (like “Good Morning” or “Away Mode”)
In projects with minimalist design goals, one beautiful smart switch mounted on the wall looks cleaner and saves space. Brands like Hager, Basalte, and MM electro provide stylish options that support this all-in-one approach.
Real-World Challenge: When Simplicity Becomes Confusion
However, in villas – particularly in Dubai – the situation is a bit more complex. These homes often have maids or domestic staff interacting with the system on a daily basis. From our experience, combining AC and lighting controls on the same device can cause operational errors.
For example:
A maid intends to turn off the lights but accidentally presses the “fan speed” button.
Someone tries to trigger a “Curtain Open” scene and mistakenly switches the AC mode from cooling to fan only.
Misunderstandings arise because the buttons lack intuitive labeling or feedback.
Such mistakes are not just inconvenient — they affect comfort. Especially in a hot climate like Dubai’s, incorrect AC settings can make indoor environments uncomfortable very quickly.
Our Recommendation: Separate the Controls
For the best usability and long-term satisfaction, we recommend:
One smart switch dedicated to AC control only (thermostat, fan speed, mode).
Another switch for lighting, curtains, and scenarios.
This setup is clearer for every user in the household — not just the owner.
Pro Tip: Use Dual Mounting Heights for Premium Design
Many professionals adopt the dual mounting standard:
Install the thermostat panel at 150 cm (eye level for better interaction).
Install the light/curtain switch at 110 cm, matching traditional switch height.
This layout looks neat, intentional, and user-friendly, while also preventing accidental interaction with the AC when adjusting lights or curtains.
Conclusion
While KNX offers incredible flexibility in user interface design, practical experience in Dubai villas shows that usability matters more than minimalism. In homes where staff frequently interact with the system, separating AC and lighting/curtain controls improves comfort, reduces errors, and makes the smart home experience truly seamless.