A louver, on the other hand, is a shutter-like screen that is angled or slanted to
release smoke from the kitchen to the outside of the house while preventing rain from coming inside the duct. Louvers are commonly used in kitchens, but can also be used in other parts of the house like bathrooms and attics. Louvers are able to prevent rain from coming inside the house while being able to let in air. Usually, a louver manufacturer would recommend people to have a louver in the kitchen because it immediately reduces the smoke emitted by ovens and stoves. It is also a good way to ventilate the kitchen area.