An aerial record.
An air register is a device used to transfer air into or out of a room. Logs serve as part of the building’s heating, ventilation, and air conditioning (HVAC) system, and can typically be found in any occupied room within the building. As the furnace or air conditioner heats or cools the air, a fan directs that air into a series of supply ducts. An air register is located at the end of each of these supply ducts and serves as a transition between the duct and the room. A second set of air registers is located at the top of each return duct, directing exhaust air from each room back into the unit.
An air return duct is an important part of most HVAC air conditioning systems.
Depending on the layout of the room and the configuration of the HVAC system, an air damper can be installed on the ceiling, floor or wall. Some fit into soffits or bulkheads near the ceiling, while others are designed to be installed in baseboards. In many structures, installers place air dampers just below the windows to minimize condensation and maximize occupant comfort. The location of an air damper can also be influenced by local building codes or existing building conditions.
Every air register has some type of vent or openings for air to pass through. The size and configuration of these openings determine the speed and volume of airflow. The earliest air registers consisted of flat metal panels with holes stamped into the face. Modern versions often contain directional vents that can be adjusted to redirect airflow as needed. They can also include angled fins or blades so that air enters the room at an angle, rather than in an uncontrolled manner.
Manufacturers produce air registers from a variety of materials, including metal and thermoplastics. Installers often select logs that match the surrounding room where they will be installed. Some can be painted to match walls or ceilings, while others feature a polished or brushed metal finish. When choosing prefinished models, buyers should look for finishes that match other hardware in the space.
The performance of an air register can be degraded by the buildup of dirt and dust over time. To keep the HVAC system working as intended, homeowners should regularly clean and maintain these registers to remove dirt and debris. If an air valve is damaged or badly clogged, it is usually easier to replace the unit than to try to repair it. Most standard air shocks are relatively inexpensive and require little effort to remove and install.