Why an HVAC Damper May Be the Right Choice for Your Home

Because some rooms need more conditioned air and others need less, an HVAC damper is a manual device that accurately regulates the flow of air into a certain room. Adjusting airflow to accommodate the square footage of a particular room — as well as other factors specific to the room — makes heating and cooling more energy efficient, eliminates hot and cold spots, and keeps room temperatures more uniform throughout the whole house.

Fine-Tuning the Flow with an HVAC Damper

The system that’s circulating conditioned air consists of a large supply duct — known as a “trunk” — in the attic that’s running through the center of the house. Smaller branch ducts connect to the main trunk and distribute air to individual rooms or zones. A damper is installed inside branch ducts leading to an individual room. The damper allows adjustments to airflow to maintain consistent temperatures in that room.  Here are some more basics about dampers:

  • In most cases, the damper is typically installed where a branch duct connects to the main trunk duct.
  • The damper is usually a manually operated disk inside the branch duct leading to the individual room.
  • Rotating a handle on the outside of the duct moves an internal disk from a wide-open position that allows full airflow into the room down to a position where the flow of air in the duct is completely shut off.
  • Adjusting dampers is typically performed in the attic where the handles that operate dampers are accessible.

Restoring Balance with an HVAC Damper

A qualified HVAC technician utilizes technology to measure cubic feet of airflow per minute (CFM) into a specific room. Usually, the air balancing process in each room involves special calculations to determine the ideal CFM to maintain a specified temperature in that room. Moving room to room, the technician adjusts and readjusts dampers, fine-tuning until temperatures in every room are consistent and airflow is proportionate throughout the entire house.

Ask the Paitson Bros. professionals about how your home might benefit from an HVAC damper in one or more rooms. For 100 years, we’ve been keeping Terre Haute comfortable and efficient in all seasons.

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