Draaitor

Draaitor is a term of Dutch origin that translates to "revolving door" in English. Revolving doors are a type of door that rotates around a central axis, typically within a cylindrical enclosure. They are commonly found in the entrances of large buildings such as hotels, office buildings, hospitals, and airports. The primary function of a revolving door is to allow people to enter and exit a building continuously while minimizing air infiltration between the interior and exterior environments. This helps to maintain a stable indoor temperature, reduce energy consumption for heating and cooling, and prevent drafts.

Revolving doors usually consist of three or four doors, or "wings," that are attached to a central shaft and rotate within a drum or enclosure. As one wing moves past the entrance, it creates a seal against the enclosure, preventing air from escaping or entering. This continuous rotation allows for a steady flow of traffic without the need for the door to be manually opened or closed. Modern revolving doors often incorporate features such as speed controls to ensure safe operation and may be powered by electric motors. Some designs also include accessibility features, such as a disabled access door that can be manually operated. The concept of the revolving door was first patented in the late 19th century.