A ventilation control system determines when and how far electrically operated windows, skylights, or rooflights open. It acts as the link between the user, the weather, and the operating mechanism – thus influencing comfort, energy consumption, and the building's protection from rain and storms. Here you will learn which components a ventilation control system needs for daily ventilation and how to combine them effectively.
Tasks of a ventilation control system
For daily comfort ventilation, a ventilation control system must primarily do three things:
- Serve: Open and close windows using a button or remote control.
- Take care of: Supply the window drive with the correct voltage and sufficient current.
- Protect: Windows close automatically in case of rain or strong winds.
Important: Everyday ventilation controls are not the same as smoke and heat exhaust ventilation systems. Smoke and heat exhaust ventilation systems (SHEVS) are subject to their own standards and require an approved SHEVS control panel. We explain the difference in the article. Smoke and heat exhaust ventilation (SHEV) and daily ventilation – what is the difference in planning?
Option 1: Ventilation button for 230 V drives
The simplest ventilation control is a push button that directly switches a 230V window actuator. VS-LT 230 ventilation button It is mounted flush with the wall and is designed for up to 250 V AC and 10 A. The cables are connected via a screwless push-in terminal system. Where no flush-mounted box is available, the VS-LT-A surface-mount ventilation button.
This solution is inexpensive and robust, but offers no automatic function: the window remains open until someone closes it again.
Option 2: 24V ventilation control with remote control and sensors
A controller with a power supply is required for 24V window actuators. VS-C24-7A controller It converts 230 V AC to 24 V DC and supplies up to 7 A for all connected drives. It is operated via a button on the device or via a radio remote control (433.92 MHz). It is suitable for all 24 V window drives from Vent Systems, such as the Chain drives the series VS-KA or the Linear actuators the VS-LA series.
Automatically closes in rain and wind
Only with sensors does the control system become a true automatic ventilation system. VS-RS rain sensor It detects precipitation via a contact grid and reports it to the VS-C24-7A so that the windows close in time. VS-WRLS-wind-rain-light sensor It also records wind speed and brightness – useful for exposed roof windows or when sun protection is also controlled by the same system.
What you should pay attention to when planning
- Voltage: The push button and control unit must be compatible with the nominal voltage of the drive (230 V AC or 24 V DC).
- Power reserve: Add up the rated currents of all drives on one controller; for the VS-C24-7A, a maximum of 7 A total.
- Lines: Choose cross-sections so that the voltage drop remains low even over long distances.
- Installation location: The VS-C24-7A is designed for indoor installation (IP 50), sensors should be installed with free airflow to the outside.
- Specialist company: Installation and commissioning must be carried out by qualified specialists only.
The same 24V control unit can also operate blinds, roller shutters, and awnings – more information in the article. 24V blind control.
Want to motorise an existing tilt window, fanlight or roof window? Find out which actuator fits in our guide Retrofitting electric window openers.
Conclusion
For individual windows with 230V motors, a simple ventilation switch is often sufficient. However, for those who want to conveniently operate multiple windows and have them close automatically in the rain, a 24V ventilation control system with a sensor is recommended. We would be happy to discuss which combination is best suited to your project in a brief consultation. Consultation. All drives, controls and accessories can be found in the Vent Systems Shop.