Luftdörrar

Luftdörrar, commonly known as revolving doors, are a type of door designed to allow multiple people to pass through a single opening while minimizing drafts, heat loss, and energy consumption. Originating in the late 19th century, they were invented to address the inefficiencies of traditional swinging doors in high-traffic areas such as office buildings, department stores, and public transport hubs.

The primary function of a luftdörr is to create a controlled barrier between indoor and outdoor environments. Instead of opening inward or outward like conventional doors, a luftdörr consists of multiple panels connected in a circular or spiral arrangement. As users enter, they push against the panels, causing them to rotate smoothly. This design ensures that only a small portion of the door is open at any given time, reducing air exchange and maintaining indoor climate efficiency.

Luftdörrar are particularly effective in cold or hot climates, as they help retain heating or cooling within a building. They also reduce energy costs by limiting the need for constant HVAC adjustments. Additionally, their rotating mechanism allows for continuous pedestrian flow without the need for manual operation, improving accessibility and convenience.

Modern luftdörrar often incorporate additional features such as glass panels for visibility, automatic sensors for hands-free operation, and weatherproof seals to enhance durability. While they are less common in residential settings, they remain a staple in commercial and institutional buildings where energy efficiency and high traffic volume are priorities.