The Lifespan of HVAC Flex Duct: What You Need to Know

Learn about the average lifespan of residential flex ducts, factors that can impact their longevity, and the importance of proper installation and maintenance from an expert in the HVAC industry.

The Lifespan of HVAC Flex Duct: What You Need to Know

As an expert in the HVAC industry, I have been asked countless times about the lifespan of flex ducts. Homeowners are curious about how long their ducts will last before needing to be replaced. The answer is not a simple one, as there are many factors that can affect the longevity of flex ducts. In this article, I will discuss the average lifespan of residential ducts, the variables that can impact their lifespan, and the importance of proper installation and maintenance. On average, residential ducts can last anywhere from 25 to 70 years.

However, the lifespan can vary greatly depending on materials used, labor involved, and maintenance practices. The average lifespan of 45 years is a good estimate to keep in mind when considering the longevity of your flex ducts. One of the main factors that can affect the lifespan of flex ducts is the type of material used.

Flexible ducts

, as the name suggests, are made from a more pliable material than hard ducts. This makes them more susceptible to wear and tear over time.

They can also sag and restrict airflow if not properly suspended. In fact, the International Association of Plumbing and Mechanical Officials is considering limiting the use of flexible ducting in residential projects to no more than 5 feet in length. This is due to the frictional energy loss that occurs during installation, especially in longer spans. This limitation is still being debated, but it highlights the potential issues with using flexible ducts in longer lengths. Another factor that can impact the lifespan of flex ducts is proper installation and maintenance. Leaks in return air ducts can cause unwanted air from basements or attics to be sucked into the system and introduced into your home.

This can lead to decreased efficiency and potential air quality issues. It is important to have your ducts properly installed and regularly maintained to prevent these issues. The Air Duct Council, a trade group that represents manufacturers and suppliers of 95 percent of the flexible ducts used in North America, claims that flex ducts can last as long as a house if properly installed. This highlights the importance of proper installation and maintenance in ensuring the longevity of your ducts. One way to help prevent unwanted visitors from entering your home through the HVAC system is by using new air ducts with the right seals and insulation. This can also improve the overall efficiency of your system, saving you money on energy costs in the long run. When flex ducts are installed in accordance with the guidelines outlined in the ACCA manuals on residential duct construction and HVAC installations, they can be quiet, energy efficient, and perform well.

This is why it is crucial to hire a professional who is knowledgeable about these guidelines and can ensure that your ducts are installed correctly.

Danny Towne
Danny Towne

Amateur coffee guru. Devoted twitter advocate. Award-winning tea expert. Amateur internet scholar. Subtly charming pop culture junkie.

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