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Updated by infochameleon on Feb 18, 2022
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Top 5 Advantages of Spiral Round Duct

Though rectangular duct has been the industry standard for years, there are many advantages to using spiral round duct, instead. Here are 5 of the top reasons to choose spiral round duct over rectangular duct.

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1. Spiral Round Duct Leaks Less

Spiral round duct has fewer transverse joints than rectangular duct, and lacks the longitudinal lock seams that traverse the length of a rectangular duct. As a result, spiral round duct is much more airtight than rectangular duct. When ductwork leaks, it takes more energy for an HVAC system to carry out its intended function. Therefore, spiral round duct performs better and is cheaper to use than rectangular duct.

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2. Spiral Round Duct Takes Up Less Space

It takes less metal to manufacture a spiral round duct than it does to manufacture a rectangular duct with the same airflow capabilities, so spiral round duct takes up less space than it’s rectangular counterpart. This makes it a good choice for applications where saving space is a priority.

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3. Spiral Round Duct is Less Noisy

Spiral round duct is more rigid than rectangular duct, and generally creates lower pressure drops (because it doesn’t have such sharp angles). As a result, spiral round duct does not vibrate as excessively as rectangular duct, and is therefore able to operate much more quietly. Spiral round duct is a great choice for HVAC applications in facilities where noise levels need to be kept to a minimum.

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4. Spiral Round Duct is More Efficient

Spiral round duct has a lower surface area than rectangular duct, and therefore generates less friction. Less friction means less energy loss and greater heat conservation. Overall, spiral round duct operates much more efficiently than rectangular ductwork.

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5. Spiral Round Duct is Cheaper

Spiral round duct requires fewer materials to manufacture than rectangular duct, is quicker and easier to install than rectangular duct, and uses energy more efficiently than rectangular duct. Therefore, spiral round duct is a much more cost effective HVAC option than rectangular duct, because it is cheaper to construct, install, and operate.