A damper is a plate or valve that is used in order to regulate or stop airflow within a chimney, duct or other air handling “things.” It may also be used in order to cut off central air conditioning in a room that doesn’t require it or to regulate the cooling with a climate control feature. It can work automatically or be used manually.
A manual damper is turned on with a handle from the outside of a duct. Automatic ones, however, regular airflow on a continuous basis and are operated with pneumatic or electric motors. They are turned off with a building automation or thermostat system.
Dampers are beneficial because they give users complete control over how much air is distributed in a particular room or area of a home. The system itself works differently than just closing a vent in a wall or floor. When the vent is shut the heated or cooled air still travels to that area, it just doesn’t penetrate the room, which is a waste of energy. The damper is installed at the mouth of a distribution pipe which will either allow or deny air. This helps to maintain the pressure in a pipe and redistributes the airflow to the rest of the home without wasting it.