{"id":17679,"date":"2026-11-07T20:15:37","date_gmt":"2026-11-07T19:15:37","guid":{"rendered":"https:\/\/ventsystems.de\/hallenfassade-lueften-zahnstangenantrieb\/"},"modified":"2026-11-08T14:57:06","modified_gmt":"2026-11-08T13:57:06","slug":"ventilating-hall-facades-rack-pinion-actuator","status":"publish","type":"post","link":"https:\/\/ventsystems.de\/en\/hallenfassade-lueften-zahnstangenantrieb\/","title":{"rendered":"Ventilating a hall fa\u00e7ade with rack-and-pinion actuators: planning with an example"},"content":{"rendered":"

In brief:<\/strong> Large top-hung sashes in hall fa\u00e7ades are best opened with rack and pinion actuators: they provide a long stroke and push and pull evenly. A sash measuring 2.5 \u00d7 1.2 m with double glazing needs around 150 N, about 190 N with reserve. Because it is wider than 1.5 m, we use two synchronously running VS-ZA-i<\/a> .<\/p>\n\n\n

The example<\/h2>\n\n\n

A workshop has ten top-hung sashes of 2,500 \u00d7 1,200 mm each in the fa\u00e7ade, double glazing 4-16-4, hinges at the top. The sashes are to open together for daily ventilation and close automatically in rain and storm.<\/p>\n\n\n

Step by step<\/h2>\n\n\n
  1. Weight:<\/strong> 2.5 \u00d7 1.2 m \u00d7 8 mm \u00d7 2.5 kg\/(m\u00b2\u00b7mm) \u00d7 1.1 \u2248 66 kg per sash.<\/li>
  2. Stroke:<\/strong> For about 24\u00b0 opening at 1,200 mm sash height, about 500 mm stroke is needed (stroke = 2 \u00d7 sash height \u00d7 sin(angle\/2)).<\/li>
  3. Force:<\/strong> 0.54 \u00d7 66 kg \u00d7 9.81 \u00d7 0.5 \/ 1.2 \u2248 146 N, with 30 % Reserve<\/a> \u2248 190 N.<\/li>
  4. Number:<\/strong> A 2.5 m sash width is above 1.5 m \u2013 so two actuators per sash, each taking about 95 N. Two VS-ZA-i with 600 N have plenty of reserve and run evenly thanks to built-in synchronisation.<\/li>
  5. Control and sensors:<\/strong> Ten sashes with two actuators each make 20 actuators. We divide these into groups; the VS-C24-7A ventilation control unit drives up to 7 actuators. A wind and rain sensor closes all sashes in rain or storm.<\/li>
  6. Cables:<\/strong> Check the cross-section of the 24 V supply cable with the \u201cCable cross-section\u201d tab in the Window actuator calculator<\/a>.<\/li><\/ol>\n\n\n

    Why rack-and-pinion and not chain?<\/h2>\n\n\n

    A chain actuator is more compact and ideal for bottom-hung and top-hung windows up to medium size. With 500 mm stroke and more, with large sashes and on roof surfaces, the rack and pinion actuator shows its strengths: the rigid rack transmits push and pull over the entire stroke. The VS-ZA 800<\/a> has up to 1,000 mm stroke and protection class IP65.<\/p>\n\n\n

    Planning checklist for halls<\/h2>\n\n\n