Does a WindowMaster actuator need to be replaced? There are matching Vent Systems alternatives for the chain actuators of the WMX and WMU series. The table compares the data directly.
Which Vent Systems drive replaces which WindowMaster actuator?
| WindowMaster actuator | Data (manufacturer) | Alternative from Vent Systems | Note |
|---|---|---|---|
| WMX 503 (concealed) | 24 V, 150 N, stroke 50–250 mm, IP32 | VS-CKA 300 built-in chain drive | concealed installation, stroke up to 1000 mm |
| WMX 504 | 24 V, 150 N, stroke 50–250 mm, surface-mounted | VS-KA 250 N, 24 V | passende Alternative |
| WMX 526 | 24 V, 150 N, stroke up to 500 mm, 7 mm/s | VS-KA 250 N, 24 V | |
| WMX 804 / WMX 826 | 24 V, SHEV version, up to 200 N | VS-KA 250 N, 24 V | also suitable for SHEV |
| WMU 8xx (e.g. WMU 862, 885) | 24 V, up to 1500 N, heavy roof and façade windows | VS-KA 600 N / 1500 N or VS-KA 2500 |
Angaben zu Fremdprodukten nach öffentlich zugänglichen Herstellerunterlagen (Stand 2026), ohne Gewähr. WindowMaster ist eine Marke ihres Inhabers; Vent Systems steht in keiner Verbindung zum Hersteller. Bitte Einbaumaß, Kraft und Steuerung vor dem Tausch prüfen.
How do I find the right alternative to my WindowMaster actuator?
Read the type, force and stroke from the type plate. For the light WMX actuators (150–200 N), the VS-KA with 250 N is suitable; for the powerful WMU actuators, the VS-KA with 600 or 1500 N or the VS-KA 2500. WindowMaster actuators operate at ±24 V – Vent Systems drives can be controlled this way; MotorLink® functions are not available.
What to consider when replacing a drive
- Force: The new drive should have at least the force of the old drive. If in doubt, choose the next higher level.
- Stroke: Keep the stroke of the old drive. It is usually stated on the type plate.
- Voltage: Connect 24 V drives only to 24 V control units or SHEV control panels, and 230 V drives only to 230 V.
- Speed for SHEV: As a rule, SHEV windows must be fully open within 60 seconds. For long strokes, check whether the running speed is sufficient.
- Zugelassene NRWG: Bei zugelassenen natürlichen Rauch- und Wärmeabzugsgeräten (NRWG nach EN 12101-2) kann ein Antriebstausch die Zulassung aufheben. Tausch nur nach Rücksprache mit dem Fensterhersteller oder einem Sachkundigen.
- Brackets and installation dimensions: The original manufacturers' brackets do not fit 1:1. Use Vent Systems brackets and check the installation dimensions using our data sheet (downloads on the product page).
- Control: Vent Systems drives are controlled conventionally via polarity reversal (±24 V) or 230 V. Manufacturer-specific bus or programming functions of the original drive are not available. Check whether the existing control unit can handle the current consumption.
Does the replacement drive work with my WindowMaster control unit?
Yes, provided the control unit switches conventionally via ±24 V (polarity reversal) and can handle the current consumption. Digital MotorLink® functions such as position feedback are not available with a third-party drive.
Download the replacement table as a PDF
Comparisons for all six manufacturers (GEZE, Aumüller, Kingspan STG, D+H, WindowMaster, HAUTAU) can be found in our replacement table for window drives (PDF) and in the guide Replacing window drives.
Not sure which drive fits?
Schicken Sie uns ein Foto des Typenschilds und des Fensters. Wir nennen Ihnen den passenden Antrieb von Vent Systems – ab Lager Hamburg, Versand innerhalb von 24 Stunden. Telefon: 040 50694631.
D+H, WindowMaster and HAUTAU are trademarks of their respective owners. Vent Systems is not affiliated with these manufacturers. The manufacturer data is taken from publicly available data sheets (as of October 2026) and is for comparison only.