balance dampers

Do doors slam shut as you try to close them whenever you’re running your HVAC system? It’s likely causing an imbalance in air pressure. One way to fix this is with balance dampers. Here’s what you need to know about what balance dampers are and what they do.

What Are Balance Dampers?

The air that flows into your home when your HVAC system is running also increases pressure. That pressure can slam open doors shut, as well as create drafts. Pressure differences can also create hot and cold spots in certain areas.

Balancing dampers are what help regulate that pressure and keep it even throughout your home. They consist of adjustable flaps, which function similarly to the slats on your vents and registers. Adjusting them redirects the airflow through your home in order to maintain the balance from room to room.

Not all homes have balancing dampers. They’re most common in houses with zoning systems, though other homes may have them as well. Check your ductwork to see if there are any mechanisms for adjusting airflow.

Balance Dampers vs. Control Dampers

In addition to balancing dampers, many homes also have control dampers. These work similarly but have different functions. The flaps on your balancing dampers are placed to adjust the direction of airflow. Control dampers, however, can be closed entirely. This allows you to redirect air away from areas you don’t use very often so you’re not paying to heat or cool an empty room.

Control dampers can be adjusted as needed. The levers to adjust them are typically located behind a vent in your house. You may need to experiment a bit to determine which dampers go with which vents. When you figure it out, label each of them so you’ll know in the future. Balancing dampers, on the other hand, are fixed in place once the proper positioning is found. If you need to readjust them, call your HVAC technician to find the right setting.

For more help balancing the airflow in your home, contact us at Mowery Heating, Cooling and Plumbing. We keep Indianapolis homes comfortable and efficient.