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How Duct System Components Work

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Your duct work system is one of the most important parts of your HVAC system. A lot of people don’t know how these work or the difference between the two. But understanding how it works can help you know what kind of services for maintenance or repair you may need.

It will also help you recognize signs that it’s time to have a professional come out for a quick service check. Let’s take a look at how this system works inside out.

Parts Of An HVAC Duct System

Duct system components are complex. Several things have to work in tandem for an HVAC system to heat or cool your home correctly.

Similar to the human body where you have the circulatory system, nervous system, and respiratory system. With ducts, they branch out to deliver the airflow to every part of your home.

These ducts are typically made of sheet metal. The ducts then connect to vents which deliver that airflow to the room in particular. This causes the heating and cooling effect.

Hvac Ductwork Components

Now let’s look at some more parts of the duct system. When you analyze the network of your HVAC air system, there’s different ways they work together. Let’s take a look at some of the different elements.

Air Handler Unit (AHU)

This is attached to your ductwork. A large metal box contains several heating and cooling elements, a blower, dampers, and filters. These can be utilized for indoor or outdoor use.


This helps regulate the airflow. It has a volume control which adjusts the amount of airflow coming in or out.

Smoke or fire dampers can seal off the duct if it detects smoke or fire. This helps protect you while keeping the home at a comfortable temperature.

HVAC Takeoffs

These are shaped differently. They’re meant to distribute the right amount of airflow into the main duct based off of each duct branch.

High efficiency takeoffs can increase the upstream. Ultimately, these are designed to increase your energy efficiency and balance throughout the duct system.


An air distribution box is called a plenum. This is a primary component of any ductwork. It sends air from a centralized location.

Then it distributes it to the different rooms via air vents. A return plenum then carries the air back into the intake. This helps efficiency of movement.

Duct fittings

A reducer is another word for a duct fitting. This is what helps you change one size duct to another. In other words, it’s like a transition piece.

These help equalize the pressure. Without the right amount of pressure, the air won’t pump through the system and ducts appropriately. A vent cap is used to help the performance by helping the ductwork vent stack.

Duct Cleaning in Marietta

Don’t hesitate to reach out to the duct cleaning experts at Speed of Need Cleaning today. Not only can they clean your ducts, but also check other parts of your heating and air conditioning equipment.

They can check for leaks, air pressure, and other signs that you might need a repair or replacement. Getting preventative maintenance is the best way to keep your home comfortable all year long. So, reach out to the professionals right now and ensure you and your family are well taken care of.

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When you call, we’re ready. Reach out to us today to request a free quote so we can get started on your cleaning needs right away.