Your HVAC system uses dampers to help direct airflow, but not every damper is the same. These devices use a plate within the ducts to deliver treated air and gases to various rooms of the home. The following overview will help you understand each type of damper and why you might need a specific one.

4 Types of Dampers In Your HVAC System

1. Volume Dampers

Every HVAC system uses volume dampers to help control how much air is directed into a room. While you can’t close these dampers completely, they can be manually adjusted to prevent most of the air from being pushed into a single area. The airflow will slow as it passes through the decreased opening, forcing the bulk of the air to be redirected elsewhere.

2. Backdraft Dampers

Your heating and cooling system likely has a vent that allows gases and exhaust to escape the home. This type of vent uses a backdraft damper, or a butterfly damper, to keep outdoor air from getting inside the home.

The blade, or damper plate, uses a spring that limits airflow to a single direction. The blade will swing open as air leaves the home, but, as a breeze tries to push air into the home, the plate will swing closed.

3. Guillotine Dampers 

When your system is in need of service, you may need to stop airflow from being pushed through specific vents. This is when a guillotine damper comes in handy. This damper seals off an entire duct, keeping treated air from your AC or heater from passing through and into your home.

Closing a guillotine damper can make it easier for a technician to service a specific area, and it can also help you limit the areas that receive treated air. These dampers are perfect for shutting off airflow to parts of the home that are rarely used.

4. Control Dampers

This motorized damper helps manage when air is pushed into specific areas of the dwelling. For instance, if a room is only occupied occasionally, sensors will identify when the room is in use. A signal will be sent from the sensor to the control damper’s motor, instructing it to open. A lack of motion in that room will result in the control dampers closing. This helps manage energy usage without having to manually open and close dampers.

 

The experienced HVAC technicians at Daryl's Heating & Air, Inc., in Branson, MO, can inspect the various parts of your system, including dampers, to ensure everything is working properly. They have more than 45 years of experience, and their technicians have the necessary skills and equipment to provide exceptional service. Their focus is on providing friendly and satisfying customer service, and they will be happy to answer any of your questions. Learn more about their services online, or call (417) 335-2658 to speak with a friendly team member.