{"id":16590,"date":"2026-10-23T09:41:48","date_gmt":"2026-10-23T08:41:48","guid":{"rendered":"https:\/\/ventsystems.de\/dachfenster-elektrisch-oeffnen\/"},"modified":"2026-10-24T17:38:22","modified_gmt":"2026-10-24T16:38:22","slug":"electric-opening-of-the-roof-windows","status":"publish","type":"post","link":"https:\/\/ventsystems.de\/en\/dachfenster-elektrisch-oeffnen\/","title":{"rendered":"Electric opening of the roof window: drive, control and operation"},"content":{"rendered":"<p class=\"wp-block-paragraph\">Roof windows are often high and hard to reach. With an electric drive, you can open and close them at the touch of a button or via a remote control, and a rain sensor automatically closes them. Here you can read which drive is suitable, how to control the window, and what the cost of retrofitting is.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>In brief:<\/strong> You open a roof window electrically with a chain or linear actuator, depending on the weight and size of the sash. A 24 V actuator needs a control unit such as the VS-C24-7A and is operated by button or radio remote control. A rain sensor closes the window automatically when it starts to rain.<\/p>\n\n\n<h2 class=\"wp-block-heading\">Which drive system fits the roof window?<\/h2>\n\n\n<ul class=\"wp-block-list\"><li><strong>Chain drive <a href=\"\/en\/product\/vs-ka\/\">VS-KA<\/a>:<\/strong> flat, inconspicuous and suitable for most roof windows. From 65 \u20ac net.<\/li><li><strong>Linear actuator <a href=\"\/en\/product\/vs-la\/\">VS LA<\/a>:<\/strong> for heavy wings and light domes with high lifting force. From 110 \u20ac net.<\/li><\/ul>\n\n\n<p class=\"wp-block-paragraph\">Weight, wing size and the desired opening distance are crucial. The lift is determined by the <a href=\"\/en\/calculate-chain-length-for-window-drive\/\">Stroke calculator<\/a>, the necessary strength of the advisors <a href=\"\/en\/calculate-the-thrust-of-window-drives\/\">Calculate thrust<\/a>. More information about the selection of chain drives is available in the guide. <a href=\"\/en\/chain-actuator-roof-windows\/\">Chain actuator for roof windows<\/a>.<\/p>\n\n\n<h2 class=\"wp-block-heading\">How to control the roof window<\/h2>\n\n\n<p class=\"wp-block-paragraph\">For a 24-V drive you need a power supply with control. The <a href=\"\/en\/product\/vs-ls7\/\">VS-C24-7A controller<\/a> Converts 230 V to 24 V and opens or closes the drive by reversing the polarity. It is operated via the button on the device or with the remote control. <a href=\"\/en\/product\/vs-c24-f-1-remote-control-for-control-vs-c24-7a\/\">radio remote control VS-C24-F-1<\/a>. Especially with high roof windows, the remote control saves an additional line to the button.<\/p>\n\n\n<p class=\"wp-block-paragraph\">Up to 10 drives can be connected to a controller, depending on the power consumption. They then operate together, for example all the roof windows in a room.<\/p>\n\n\n<h2 class=\"wp-block-heading\">Automatically closes when it rains<\/h2>\n\n\n<p class=\"wp-block-paragraph\">An open roof window allows water to enter quickly when it rains. A <a href=\"\/en\/product\/vs-rs\/\">Rain sensor VS-RS<\/a> (33 \u20ac net) or one <a href=\"\/en\/product\/vs-ws\/\">Wind-rain light sensor VS-WRLS<\/a> (55 \u20ac net) is connected to the control unit and automatically closes the windows. Details are provided in the guide. <a href=\"\/en\/rain-sensor-for-windows\/\">Rain sensor for windows<\/a>.<\/p>\n\n\n<h2 class=\"wp-block-heading\">Cost example: a roof window with radio and rain sensor<\/h2>\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>Position<\/th><th>Net price<\/th><\/tr><\/thead><tbody><tr><td>Chain drive VS-KA 24 V (250 N, 100 mm stroke)<\/td><td>65 \u20ac<\/td><\/tr><tr><td>VS-C24-7A controller<\/td><td>60 \u20ac<\/td><\/tr><tr><td>radio remote control VS-C24-F-1<\/td><td>14 \u20ac<\/td><\/tr><tr><td>Rain sensor VS-RS<\/td><td>33 \u20ac<\/td><\/tr><tr><td><strong>Material overall<\/strong><\/td><td><strong>172 \u20ac<\/strong><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n<p class=\"wp-block-paragraph\">Prices as of October 23, 2026, plus VAT. In addition, there are wiring and installation costs for an electrician. The guide provides more examples. <a href=\"\/en\/window-actuator-cost\/\">How much does an electric window drive cost?<\/a>.<\/p>\n\n\n<h2 class=\"wp-block-heading\">24 V or 230 V?<\/h2>\n\n\n<p class=\"wp-block-paragraph\">A 230-V drive is sufficient for a single roof window with wall buttons. Once several windows are to be operated together, a sensor must be connected or a radio remote control must be used; 24 V with control is the better choice. The detailed comparison can be found in the guide. <a href=\"\/en\/window-actuator-24v-or-230v\/\">Window actuator 24 V or 230 V<\/a>.<\/p>\n\n\n<h2 class=\"wp-block-heading\">Frequently asked questions<\/h2>\n\n\n<h3 class=\"wp-block-heading\">Can I retrofit an existing roof window?<\/h3>\n\n\n<p class=\"wp-block-paragraph\">In most cases, yes. The drive is attached to the frame and wings using brackets. A standard bracket set is included in the price for VS-KA and VS-LA. How the retrofit is carried out is shown in the guide. <a href=\"\/en\/retrofitting-electric-window-openers\/\">Retrofitting electric window openers<\/a>.<\/p>\n\n\n<h3 class=\"wp-block-heading\">Do I need a controller for each window?<\/h3>\n\n\n<p class=\"wp-block-paragraph\">No. A VS-C24-7A control unit powers up to 10 drives, depending on the power consumption. All connected drives run together.<\/p>\n\n\n<h3 class=\"wp-block-heading\">Is the control suitable for smoke extraction?<\/h3>\n\n\n<p class=\"wp-block-paragraph\">No. The VS-C24-7A is intended for daily ventilation. An approved RWA control panel is required for RWA.<\/p>\n\n\n<h2 class=\"wp-block-heading\">Request a quote<\/h2>\n\n\n<p class=\"wp-block-paragraph\">Please send us the dimensions, weight and a photo of your roof window via the <a href=\"\/en\/contact\/\">Contact form<\/a> or use the <a href=\"\/en\/measurement-sheet\/\">measurement sheet<\/a>. We assemble the drive, control, and accessories together for you.<\/p>","protected":false},"excerpt":{"rendered":"<p>Electricly opening roof windows: suitable drive, 24-V control with remote control, rain sensor and cost overview.<\/p>","protected":false},"author":9,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1958],"tags":[],"post_folder":[],"class_list":["post-16590","post","type-post","status-publish","format-standard","hentry","category-lueftung-gebaeudeautomation"],"acf":[],"_links":{"self":[{"href":"https:\/\/ventsystems.de\/en\/wp-json\/wp\/v2\/posts\/16590","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ventsystems.de\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ventsystems.de\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ventsystems.de\/en\/wp-json\/wp\/v2\/users\/9"}],"replies":[{"embeddable":true,"href":"https:\/\/ventsystems.de\/en\/wp-json\/wp\/v2\/comments?post=16590"}],"version-history":[{"count":1,"href":"https:\/\/ventsystems.de\/en\/wp-json\/wp\/v2\/posts\/16590\/revisions"}],"predecessor-version":[{"id":16672,"href":"https:\/\/ventsystems.de\/en\/wp-json\/wp\/v2\/posts\/16590\/revisions\/16672"}],"wp:attachment":[{"href":"https:\/\/ventsystems.de\/en\/wp-json\/wp\/v2\/media?parent=16590"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ventsystems.de\/en\/wp-json\/wp\/v2\/categories?post=16590"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ventsystems.de\/en\/wp-json\/wp\/v2\/tags?post=16590"},{"taxonomy":"post_folder","embeddable":true,"href":"https:\/\/ventsystems.de\/en\/wp-json\/wp\/v2\/post_folder?post=16590"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}