In brief: Windows in old buildings can also be opened electrically. What matters is a stable frame, smooth-running fittings and a clean cable route. For most windows in old buildings, a flat chain actuator from €65 net is sufficient. For listed buildings, clarify the installation with the monument authority beforehand.
What is different in old buildings?
- Wooden frames: The actuator is screwed on with brackets. The wood must be firm and dry; repair rotten areas beforehand.
- Box-type windows: Usually only the inner sash is motorised. The actuator needs space between the inner and outer sash or on the inner frame.
- Old fittings: First free up stiff hinges and stays. An actuator does not replace defective mechanics.
- Cable route: There is often no cable at the window. In old buildings, a surface-mounted cable duct is usually the simplest solution.
24 V or 230 V in an old building?
If there is a socket or cable nearby, a 230 V actuator with a button is the simplest solution. Several windows, a rain sensor or radio control speak for 24 V with the controller VS-C24-7A. With the radio remote control VS-C24-F-1 , there is no need for a cable to the button. The electrical connection is carried out by a qualified electrician.
Which actuator fits?
| Window in an old building | Recommendation | Net price |
|---|---|---|
| Bottom-hung window, transom window | VS-KA chain actuator 250 N | from 65 € |
| Wide transom window over 1.2 m | VS-DKA 800 or 2 × VS-KA-i | from €196 |
| Roof window, dormer | VS-KA 250–400 N | from 65 € |
| Without power, crank only | VS-MKA2 mechanical | 85 € |
Calculate the force for your window with the Window actuator calculator, the stroke with the Chain Length Calculator..
Listed buildings
For a listed building, visible changes to the window often need a permit. A small actuator on the inside of the frame is usually not a problem, but should be agreed with the local monument protection authority beforehand.
Frequently asked questions
Can I open an old wooden window electrically?
Yes, if the frame and fittings are in good condition. The chain actuator is screwed to the frame and the sash with brackets.
Do I need new cables?
For the power supply, yes, if there is no cable at the window. You can save the cable to the button by using a radio remote control.
What does retrofitting in an old building cost?
Material starts at about €100 net per window including a button. Installation comes on top; in old buildings it is often a little more because of the cable route. Examples can be found under Window actuator costs.
Advice
Send us photos and dimensions of your window to info@ventsystems.de or call us: +49 40 50694631. We will tell you which actuator fits.
Technical terms in the glossary: Box-type window, Listed buildings, Transom window.
Technically reviewed by Dietmar Heiken, Sales, Vent Systems HDI GmbH, Hamburg – around 20 years of industry experience. Questions? Phone +49 40 50694631 or info@ventsystems.de
Last updated: 28.10.2026
Questions? 040 50694631 · info@ventsystems.de
