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 from 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.

What is a Booster Fan?

By C.L. Rease
Updated May 16, 2024
Our promise to you
HomeQuestionsAnswered is dedicated to creating trustworthy, high-quality content that always prioritizes transparency, integrity, and inclusivity above all else. Our ensure that our content creation and review process includes rigorous fact-checking, evidence-based, and continual updates to ensure accuracy and reliability.

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.

Editorial Standards

At HomeQuestionsAnswered, we are committed to creating content that you can trust. Our editorial process is designed to ensure that every piece of content we publish is accurate, reliable, and informative.

Our team of experienced writers and editors follows a strict set of guidelines to ensure the highest quality content. We conduct thorough research, fact-check all information, and rely on credible sources to back up our claims. Our content is reviewed by subject matter experts to ensure accuracy and clarity.

We believe in transparency and maintain editorial independence from our advertisers. Our team does not receive direct compensation from advertisers, allowing us to create unbiased content that prioritizes your interests.

Friction between air and ductwork reduces the speed of air moving through a duct system. This leads to some areas of a building receiving less air, causing imbalances in the temperatures throughout the conditioned space. Booster fans inside of heating, ventilation and air conditioning (HVAC) ductwork increase the velocity of air traveling through a duct system. The booster fan style required for a duct system varies based on the material used in the duct construction and the specific problems with air velocity.

Duct systems utilizing round ductwork use an inline booster fan housed within a fitting that mounts between two pieces of duct. Round duct booster fans provide a small increase in air velocity and install in series over long runs of round duct. Rectangular duct booster fans slide inside a joint of metal ductwork and install using self-tapping sheet metal screws. A second type of rectangular booster fan sits in a metal sleeve and slides inside ductwork made from fiberglass sheeting. Sleeved types of booster fans install using specialized clips designed to hold in the weak fiberglass.

Increasing the velocity of an existing HVAC system with no access to the installed ductwork requires a specialized booster fan designed to install at the ends of a duct system. Vent booster fans pull air down a duct line to increase the flow of air emitting from a HVAC vent mounted in the ceiling, wall or floor. A vent booster fan installs above the top of the vent mounting flange. Another booster fan type increases the velocity of air movement outside of an HVAC system and reduces a common fire hazard in a home or other building.

Easily combustible lint sitting in a flexible dryer hose or dryer vent creates a fire hazard capable of destroying a structure. Dryer booster fans sit between the flexible hose coming from the back of a dryer and the vent pipe carrying exhaust air from the dryer to the outside of the building. The increased air velocity provided by a dryer booster fan forces more lint out of the dryer vent, reducing the chances of a flash fire.

All booster fans require an annual cleaning to ensure proper operation. Dryer booster fans are the exception and require at least two cleanings a year to avoid lint buildup on the blades of the booster fan. Maintaining a proper maintenance schedule will increase the life of both HVAC booster fans and dryer booster fans.

HomeQuestionsAnswered 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.

Discussion Comments

HomeQuestionsAnswered, in your inbox

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

HomeQuestionsAnswered, in your inbox

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