What Does a Damper Do in My HVAC?

South End Plumbing, Heating, & Air Expert Tips

What Does a Damper Do in My HVAC

Whatever the weather, hot or cold, the majority of households have invested in a cooling and heating system. Still, not many property owners know what components and parts are in an HVAC system. As long as the system is cooling or warming the home, they are good to go. So, what are dampers in HVAC systems? Are they important? And just how do they work?

Dampers are among those important HVAC components that most of us don’t even understand or always just take for granted. You can learn about them and know how they operate for the whole system for heating and cooling in your home.

What are HVAC Dampers?

A damper controls the airflow in a HVAC system. It additionally aids in changing your interior temperature. It could be thought of as similar to a dam, in that, when a damper is shut, it stops the air from going through it. This is sort of the way a dam on a body of water works.

Cooling and heating dampers for ducts are normally located in between the primary trunk line and the round supply duct. They resemble shutoffs, which play a vital function in a zoning system if that’s the system you have.

Normally, they are plate-like components that help close parts of your air ducts system while keeping others open. This way, if you wish to prevent airflow to a specific area or level, you can quickly make use of the dampers to do so.

How Do Dampers Function?

Cooling and heating dampers are like shutoffs. They are tasked with controlling the amount of cooled or warmed air that goes to various locations in your ductwork. The ductwork will, subsequently, increase or decrease the temperature level to the needed degree in the whole home or zones of the system.

By closing the dampers, you will be directing the air movement in a certain direction. This way, if you want a particular location cooled or heated, these parts function to achieve that. Unlike shutting the vents, dampers are installed relatively closer to the air source, meaning they are more efficient in redirecting the air flow.

How Do HVAC Dampers Work?

One of the best ways to understand how HVAC dampers work is to understand what dampers are. Dampers in your HVAC system are the devices that help with regulating temperature around the home when using an HVAC zoning system. They resemble shutoffs that determine how much heated or cooled air is needed to feed into different locations of your ductwork that will then decrease or raise the area’s temperature to its preferred setting. Heating and cooling dampers function to help offer homeowners manage over the quantity of air that is distributed to the zone in question.

Damper systems are different than simply shutting an air vent in the flooring or on the wall surface. A closed vent still allows the warmed or cooled down air to take a trip the length of the duct, where it after that simply sits and winds up being a waste, returning to room temperature. HVAC dampers function by being positioned closer to the mouth of the distribution pipe and will push or hold air from that point as needed. The pressure in the duct will then redistribute the air flow to whatever zone requires regulating during that time.

Louver Dampers

They are the most frequently utilized cooling dampers in cooling and heating systems. Individuals enjoy them as a result of their high quality and ability to match with any air duct dimension. The effective air stopping functionality has actually made them the best selection for lots of property owners.

How Do HVAC Dampers Run?

This question may seem like a repeat of “how do heating and cooling dampers work?” yet it is a little separate since it covers the actual system of the dampers, and the functions of manual and mechanized ones.

HVAC dampers come in two types– manual or motorized. Manual dampers work by the homeowner turning a screw to regulate the air flow that goes into a particular area. On the other hand, a mechanized damper works without being hands on.

Mechanized dampers are easier for property owners with a set HVAC zoning system, as they work with the whole HVAC system and follow the residence’s heating and cooling settings set by the owner or resident.

The Benefits of HVAC Dampers

The last important bit we will check out is what benefits HVAC dampers give a home or property. The most noteworthy one is its ability to handle your general house temperature. This is very substantial for households with numerous members as well as areas that need temperature control.

For example, you can modify your kitchen’s temperature without disrupting your residence’s whole temperature making use of an AC damper.

Secondly, HVAC dampers decrease high power bills. Whenever you limit the airflow, the AC system is generally on reduced power when running. This way, you will minimize your expense on AC on average.

The bottom line is you should understand more about what dampers do in your home HVAC system. It helps to at least know enough so you can ask a technician about dampers. Get to know its features and the benefits it will bring when managing your residence’s temperature and climate controls. It can be unfortunate if you invest in a HVAC system that is not functioning effectively because of poor info. With this expertise, you can make an educated choice when sourcing an excellent heating and cooling damper for your home.


At South End Heating and Air we are Charlotte’s affordable AC experts. Call us anytime for a free consult and free estimate. We’ll evaluate your system and help make recommendations for optimum value. After all, we want to keep you cool all summer long and warm in the winter. Just schedule a visit with one of our technicians to talk about how we can help. Would you like to learn more options our techs can help you with? Give us a call 704-684-5339.

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