Motorized curtains are no longer a luxury add-on in new-build hotels — they are a comfort, energy and housekeeping feature rolled into one. KNX controls them on the same bus as lighting and HVAC, so blinds become part of the room's behaviour rather than a separate remote. Here is how it works in practice.
How KNX drives curtain motors
Curtain and blind motors connect through a KNX switching or positioning actuator that supports percentage open/close and timed moves. From the guest's perspective it is one button; behind it, the bus sends a target position and the motor moves to it.
Scene and daylight linkage
A morning scene eases blinds open at wake-up; a midday scene closes them on the sunny side to cut cooling load; an evening scene draws them for privacy. Because blinds share group addresses with lighting, the same scene adjusts both together.
Summer solar shading and cooling load
In hot climates the biggest curtain benefit is shading. Closed blinds on sun-exposed façades reduce solar gain and let the AC run less. On projects in tropical and Gulf markets this is one of the simpler, measurable energy levers.
Power loss and position memory
A common worry is “what happens when the power blinks?” Quality curtain actuators remember their last position and re-home gracefully on restore, so blinds do not jerk or reset to a wrong state after an outage.
Frequently asked questions
- Can curtains and lighting be triggered by the same scene?
- Yes. In KNX a scene groups blinds, lights and HVAC under one command, so a single press sets the whole room mood.
- How do I size the curtain track?
- Size the track to the window clear width plus overlap, and use a higher-torque (around 50 kg class) motor for heavy blackout drapes.