{"id":17793,"date":"2026-11-07T21:36:15","date_gmt":"2026-11-07T20:36:15","guid":{"rendered":"https:\/\/ventsystems.de\/buero-automatisch-lueften-fensterantrieb\/"},"modified":"2026-11-08T14:56:48","modified_gmt":"2026-11-08T13:56:48","slug":"ventilating-offices-automatically-window-actuators","status":"publish","type":"post","link":"https:\/\/ventsystems.de\/en\/buero-automatisch-lueften-fensterantrieb\/","title":{"rendered":"Ventilating offices automatically: window actuators for fanlights and night cooling"},"content":{"rendered":"<p class=\"wp-block-paragraph\"><strong>In brief:<\/strong> In the office, automatic window actuators provide fresh air without anyone having to reach the fanlights: during the day by CO\u2082 or schedule, in summer at night for cooling. In rain and wind the windows close by themselves. For individual rooms a 24 V ventilation control unit with switch is enough; for whole floors the actuators are connected to the building management system.<\/p>\n\n\n<h2 class=\"wp-block-heading\">When is automation worthwhile in the office?<\/h2>\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Air quality:<\/strong> In meeting rooms the CO\u2082 level rises quickly; automatic purge ventilation keeps the air fresh, see <a href=\"\/en\/dictionary\/co2-sensor\/\">CO\u2082 sensor<\/a>.<\/li>\n\n\n<li><strong>Summer:<\/strong> <a href=\"\/en\/dictionary\/night-cooling\/\">Night cooling<\/a> lowers the room temperature in the morning, without an air conditioner.<\/li>\n\n\n<li><strong>High fanlights:<\/strong> Windows that cannot be reached open at the push of a button instead of with a crank.<\/li>\n\n\n<li><strong>Open-plan office:<\/strong> <a href=\"\/en\/dictionary\/cross-ventilation\/\">Cross ventilation<\/a> through opposite windows exchanges the air faster.<\/li>\n<\/ul>\n\n\n<h2 class=\"wp-block-heading\">Which actuators are suitable?<\/h2>\n\n\n<p class=\"wp-block-paragraph\">For fanlights and bottom-hung windows a <a href=\"\/en\/product-category\/chain-drives\/\">Chain actuator<\/a> again <a href=\"\/en\/product\/vs-ka\/\">VS-KA<\/a> with 250 N is usually enough. For heavy or wide sashes there are stronger force ratings and operation with two actuators. If many rooms are to be controlled centrally, the smart actuators of the i-series fit, such as the <a href=\"\/en\/product\/vs-ka-i\/\">VS-KA-i<\/a> with <a href=\"\/en\/dictionary\/modbus\/\">Modbus<\/a>interface.<\/p>\n\n\n<h2 class=\"wp-block-heading\">Control: room or building<\/h2>\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Single room:<\/strong> <a href=\"\/en\/product-category\/controls\/\">Ventilation control<\/a> 24 V with <a href=\"\/en\/dictionary\/ventilation-switch\/\">Ventilation switch<\/a>, optionally with <a href=\"\/en\/dictionary\/rain-sensor\/\">Rain sensor<\/a> and <a href=\"\/en\/dictionary\/wind-monitor\/\">Wind monitor<\/a>.<\/li>\n\n\n<li><strong>Whole floor:<\/strong> i-series actuators connected via Modbus to the building management system, which evaluates CO\u2082, temperature and weather.<\/li>\n\n\n<li><strong>Night ventilation:<\/strong> only windows that cannot be reached from outside or whose opening width is limited; always close in rain and wind.<\/li>\n<\/ul>\n\n\n<h2 class=\"wp-block-heading\">What planners should consider<\/h2>\n\n\n<ul class=\"wp-block-list\">\n<li>Protect closing edges on windows within reach, or only operate fanlights automatically.<\/li>\n\n\n<li>Manual operation must remain possible at all times.<\/li>\n\n\n<li>Size the power supply and cable for all actuators, see <a href=\"\/en\/calculate-24v-power-supply-window-actuators\/\">power supply calculator<\/a>.<\/li>\n\n\n<li>Smoke exhaust is a separate topic and is planned project-specifically with an approved SHEV control panel.<\/li>\n<\/ul>\n\n\n<p class=\"wp-block-paragraph\">Costs and examples for retrofitting can be found under <a href=\"\/en\/window-actuator-cost\/\">Window actuator costs<\/a>. For a quote, send photos and dimensions via the <a href=\"\/en\/project-enquiry\/\">Project enquiry<\/a>.<\/p>\n\n\n<p class=\"wp-block-paragraph\"><strong>Read more:<\/strong> <a href=\"\/en\/cooling-office-summer-without-air-conditioning\/\">Cooling an office in summer without air conditioning: automatic night ventilation<\/a><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Frequently asked questions<\/h2>\n\n\n<h3 class=\"wp-block-heading\">Can office windows be automated retrospectively?<\/h3>\n\n\n<p class=\"wp-block-paragraph\">Yes, usually without replacing the window: the actuator is mounted on the frame with a bracket. It requires space on the frame and suitable hardware.<\/p>\n\n\n<h3 class=\"wp-block-heading\">Is night cooling worthwhile in the office?<\/h3>\n\n\n<p class=\"wp-block-paragraph\">Noticeably in well-insulated buildings with thermal mass: cool night air absorbs the heat from ceilings and walls. How much it brings depends on the building and location.<\/p>\n\n\n<h3 class=\"wp-block-heading\">Do I need a separate control unit for each office?<\/h3>\n\n\n<p class=\"wp-block-paragraph\">No. Several actuators can run on one control unit; with many rooms, connection to the building management system via Modbus is clearer.<\/p>","protected":false},"excerpt":{"rendered":"<p>Ventilating offices automatically: CO\u2082 ventilation, night cooling, suitable window actuators and control for a room or the building management system.<\/p>","protected":false},"author":9,"featured_media":0,"comment_status":"open","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1958],"tags":[],"class_list":["post-17793","post","type-post","status-publish","format-standard","hentry","category-lueftung-gebaeudeautomation"],"acf":[],"_links":{"self":[{"href":"https:\/\/ventsystems.de\/en\/wp-json\/wp\/v2\/posts\/17793","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=17793"}],"version-history":[{"count":2,"href":"https:\/\/ventsystems.de\/en\/wp-json\/wp\/v2\/posts\/17793\/revisions"}],"predecessor-version":[{"id":17870,"href":"https:\/\/ventsystems.de\/en\/wp-json\/wp\/v2\/posts\/17793\/revisions\/17870"}],"wp:attachment":[{"href":"https:\/\/ventsystems.de\/en\/wp-json\/wp\/v2\/media?parent=17793"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ventsystems.de\/en\/wp-json\/wp\/v2\/categories?post=17793"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ventsystems.de\/en\/wp-json\/wp\/v2\/tags?post=17793"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}