Terms of the Trade: What Are Louvers? Terms of the Trade: What Are Louvers?
Louvers are seen in various areas around the home—they're a series of horizontal slats or angled strips that allow air or light through on doors, windows, shutters, screens, etc. Sometimes on windows or doors, the slats are adjustable to control weather or light exposure. They were first used on the roofs of medieval buildings to allow for ventilation from cooking fumes or fires.