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Mistake & recovery · #030

Installing a flex duct connection that is kinked at the elbow

1st YearInstallation

Allow enough flex duct length for a smooth, large-radius bend — never less than one duct diameter of radius. Kinked flex can reduce airflow by 50% or more…

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Safer field move

Allow enough flex duct length for a smooth, large-radius bend — never less than one duct diameter of radius. Kinked flex can reduce airflow by 50% or more. Use a metal elbow if space is tight.

Ask Foreman

Can you verify this before I keep going? I’m looking at: Installing a flex duct connection that is kinked at the elbow. What’s the approved correction for this job?

Do not

Do not hide, force, cover, or “make it work” if this affects safety, access, airflow, rated assemblies, supports, equipment, or inspection. Stop and verify the approved correction.

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