What Is A Damper for HVAC And What Does It Do?

What Is A Damper for HVAC And What Does It Do?

When it comes to your HVAC system, there are a lot of components and moving pieces. Since you're not a full-time technician like our team at Moncrief Heating & Air Conditioning, you might be wondering “What are dampers for HVAC units?”

Let's explain what an HVAC damper is and what it does. That way you can keep your home comfier, no matter what the temperature is outside.

Overview: What Do Dampers Do In HVAC Systems?

An HVAC damper or a duct damper is a movable plate that's in the ductwork of your HVAC system. It can open and close to control the airflow coming in and out of the ducts. Depending on how it closes, it divides the home into zones and directs the air appropriately where you need it for the most cooling or heating.

It can ultimately help you avoid heating or cooling a certain area too much, thereby optimizing your energy usage.

What Are Dampers Used For In HVAC?

Essentially, HVAC dampers function as valves for your system's airflow. They create a dam-like effect when they're closed. Likewise, when they're open, air is free to flow throughout your ducts and into various parts of your home. They're similar to vents, but they're closer to the air source, hence the distinction.

Dampers are incredibly effective for ensuring certain parts of your home receive more airflow. For instance, if you aren't using the basement, you can shut off airflow to that area, allowing more cooling air to reach your kitchen, bedrooms, and other rooms.

Where Are Dampers Typically Located In Your Home?

Usually, the dampers are somewhere between your heating and cooling system's supply duct and the trunk line.

The main trunk line comes out of the furnace to provide air for the entire home. Of course, each home is different. If you have additional questions about this, you can reach out to our HVAC technicians at Moncrief Heating & Air Conditioning.

Different Type Of Dampers For HVAC Units

Primarily there are automatic dampers that use a motor to open and close the valves, and manual dampers. These are typically cheaper and allow you to manually open or shut the damper.

There are additional categories to keep in mind as well, such as:

Butterfly Flat Dish Dampers

These have the appearance of a butterfly and have a round blade and a seal that meets the blade's edges. These are ideal for round ducts and take up relatively little space.

Blade Dampers

These can stop airflow faster than butterfly dampers using two blades to close or open. They can move in the same or opposite direction to customize airflow.

Inlet Vane Dampers

These are also called internal vane controls or variable inlet vanes. These don't close off or direct airflow completely. Conversely, they function like small vents to control pressure.

Adjusting Dampers

If you don't know what you're doing, it can be dangerous to adjust the dampers yourself. You may not put them on the right setting, which could lead to wasteful energy usage or discomfort during extreme weather. It's best to call the professionals so you can have peace of mind that everything’s working as it should.

Not only are there several things you need to know about HVAC installation, but also for maintenance, cleaning, or adjusting dampers. So working on your heater or air conditioner is not as simple or risk-free as it sounds.

Get Heating And Air Conditioning Service Today

At Moncrief Heating & Air Conditioning, our experts will take care of your HVAC system with attention to detail and expertise. No matter what kind of HVAC service you need in Midtown, Roswell, Sandy Springs, or Dunwoody, our team has the resources to make it happen.

So contact us today to schedule a free appointment, and learn how you can keep your home more comfortable no matter the season.