Dream Steam Blog

Where Is the Duct in My HVAC System?

Jul 8, 2021 1:15:00 PM / by Brant Hambly


When you think of your HVAC system, you probably think of the large and often bulky air conditioner that sits outside of your home, but your air ducts are another important part of your HVAC system. You can think of your air ducts as the arteries of your HVAC system; as air passes through them, it’s important to keep them clean and clear for quality indoor air circulation.

Where and What Is the Air Duct?  

Your air ducts are the main players in transporting air from the system into your home, connecting each room of the building to circulate the air. The ducts run from the main system to the vents. Your air ducts will be located within the framing of your home. They can be within floors, ceilings, or walls. If your vents are located on the floor, you will find your ducts in the flooring. If your vents are on the ceiling, your ducts are in the ceiling or walls.



Anatomy of Air Ducts 

Your air ducts can be further broken down into duct pipes and trunks. The duct pipes connect to the rooms and take the air there, and the trunk is the main duct and starting point of the duct system. Duct transitions are specialized connectors that link the trunk to the pipes. These are necessary because every home is different, so there isn’t one way to fit a duct system into a home. The transitions allow air ducts to be customized for your home.



Why Is It Important to Keep Air Ducts Clean?  

Clean air ducts are important because they help keep your indoor air clean and your HVAC system running smoothly and efficiently. When ducts are filled with dust, dirt, hair, allergens, or even mold, the indoor air quality of your home can decline, and your system can be impeded from operating at its best. Indoor air quality is important for keeping your family healthy. Your ducts should be cleaned every 3 to 5 years, or more often if your home any of the following:

  • Water infiltration affecting the HVAC system
  • Construction or renovation in your home
  • Pets
  • Cigar or cigarette smoke
  • Occupants who are especially sensitive to dust and allergens


Scheduling regular professional cleaning for your air ducts can prevent health issues that come from poor indoor air quality. In addition, clean air ducts will help maintain the efficiency and effectiveness of your HVAC system. Subscribe to our blog for additional air duct tips!

Subscribe to Our Blog

Topics: Insider

Written by Brant Hambly