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History. Louvers originated in the Middle Ages as lantern-like constructions in wood that were fitted on top of roof holes in large kitchens to allow ventilation while keeping out rain and snow. They were originally rather crude constructions consisting merely of a barrel.

What is the purpose of a louver?
1. Ventilation Control
Louvers are designed with angled slats or fins to permit the passage of air, regulating airflow within a structure. This controlled ventilation helps maintain air quality by preventing water, dirt, and impurities from entering and ensuring a comfortable interior environment.

2. Natural Light Management
The slatted design of louvers allows diffused natural light to enter a space while preventing direct sunlight from overpowering the interior. This helps in creating a well-lit environment without the drawbacks of excessive glare or heat.

3. Weather Protection
Louvers act as a barrier against external elements such as rain and debris. The angled slats deflect rainwater, preventing it from entering the building, and obstruct airborne debris from compromising the interior.

4. Energy Efficiency
By controlling the amount of sunlight and airflow, louvers contribute to energy efficiency. They reduce the reliance on artificial heating and cooling systems, promoting a more sustainable and cost-effective approach to temperature regulation.

5. Privacy
Louvers offer a degree of privacy by obstructing direct views from the outside. This is particularly beneficial for windows in residential or commercial spaces, allowing occupants to enjoy natural light without compromising their privacy.