We are independent & ad-supported. We may earn a commission for purchases made through our links.
Advertiser Disclosure
Our website is an independent, advertising-supported platform. We provide our content free of charge to our readers, and to keep it that way, we rely on revenue generated through advertisements and affiliate partnerships. This means that when you click on certain links on our site and make a purchase, we may earn a commission. Learn more.
How We Make Money
We sustain our operations through affiliate commissions and advertising. If you click on an affiliate link and make a purchase, we may receive a commission from the merchant at no additional cost to you. We also display advertisements on our website, which help generate revenue to support our work and keep our content free for readers. Our editorial team operates independently of our advertising and affiliate partnerships to ensure that our content remains unbiased and focused on providing you with the best information and recommendations based on thorough research and honest evaluations. To remain transparent, we’ve provided a list of our current affiliate partners here.
Industry

Our Promise to you

Founded in 2002, our company has been a trusted resource for readers seeking informative and engaging content. Our dedication to quality remains unwavering—and will never change. We follow a strict editorial policy, ensuring that our content is authored by highly qualified professionals and edited by subject matter experts. This guarantees that everything we publish is objective, accurate, and trustworthy.

Over the years, we've refined our approach to cover a wide range of topics, providing readers with reliable and practical advice to enhance their knowledge and skills. That's why millions of readers turn to us each year. Join us in celebrating the joy of learning, guided by standards you can trust.

What is a Ventilation Duct?

By Sherry Holetzky
Updated: May 17, 2024
Views: 8,199
Share

HVAC stands for heating, ventilation, and air conditioning. Ventilation is part of the process of heating or cooling air, which creates comfortable temperatures in a space. Air must be moved to and from a heating or cooling unit. Heated or cooled air, also known as conditioned air, is then moved out to the living or working space. This is done through the use of a ventilation duct. As the conditioned air is delivered, an equivalent amount of air must then be moved to the unit once again so it too can be conditioned.

While many homes today are built airtight for greater energy efficiency, the ventilation process helps substitute fresh air for stale air, which is then exhausted from the space. Both can occur by way of ventilation ducts. Some HVAC systems, often in commercial environments, allow the same air to be recycled or reconditioned. This is simply transferred air and not recommended. Too many pollutants can contaminate air and diminish oxygen, requiring another method of ventilation or air purification to obtain and maintain optimal air quality.

Such systems may employ intermittent ventilation, which means certain high-risk areas are ventilated quickly to remove contaminants or even moisture. A good example is the use of an exhaust fan. However, in many residential settings, continuous or central ventilation is preferred. Continuous ventilation is simply the process in which stale air is replaced with fresh air on a slow yet steady basis.

The ventilation duct system is generally designed in a way that allows for the most efficient delivery of fresh air to the system and conditioned air to the receiving spaces. The less air has to travel, the less likely it is to lose temperature or to be contaminated. A ventilation duct, or parts of it, may be made from rigid or flexible material. Flexible parts of the ventilation duct are generally smaller lengths, frequently used to conveniently attach rigid ductwork to the system. Flexible materials may also be used in other difficult to manipulate spaces.

With central HVAC systems, the ventilation duct, its construction and placement, are important parts of the overall conditioning and delivery process. Intakes and outlets must be appropriately spaced and vented in order to keep fresh air from being contaminated by stale air. When air mixes, it not only hinders the performance of the system, but it also diminishes air quality. Ventilation duct leaks can also create air quality problems as well as inefficiency, so proper HVAC maintenance is essential.

Share
WiseGeek is dedicated to providing accurate and trustworthy information. We carefully select reputable sources and employ a rigorous fact-checking process to maintain the highest standards. To learn more about our commitment to accuracy, read our editorial process.

Editors' Picks

Discussion Comments
Share
https://www.wisegeek.net/what-is-a-ventilation-duct.htm
Copy this link
WiseGeek, in your inbox

Our latest articles, guides, and more, delivered daily.

WiseGeek, in your inbox

Our latest articles, guides, and more, delivered daily.