Category: Duct & Sheet Metal
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Why won’t the drives go on? Because the flat sheet was cut out of square before it was ever bent. The joint is tight on one side and open on the other, so the drive cannot span the wide side. It is a shop problem that you are finding in the field, and it started…
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As an Amazon Associate I earn from qualifying purchases. What is a duct take-off? A take-off is the fitting that lets a branch line leave a trunk duct. You cut a hole in the trunk, attach the take-off, and run pipe or flex from it to a register. Spin-ins, start collars and high efficiency take-offs…
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How far apart should duct hangers be? Six feet on commercial rectangular duct, eight feet residential, and one hanger within two feet of every elbow. Round pipe holds up at ten. Those are field numbers, not code minimums — the heavier the duct, the tighter the spacing needs to get. Check the tables. The standard…
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My duct elbow came apart. Is it ruined? Probably not. Open the seam at one end with a screw driver, hold the elbow firm, and spin the free piece back into the groove — firmly, without crushing it. Squish the oval back round as you go if you need to. The one thing that kills…
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As an Amazon Associate I earn from qualifying purchases. How do you install a spin-in take-off? Trace the spin-in on the duct, punch a starter hole with the pointy end of your hammer, and cut about a quarter inch inside your line with snips. Straddle the open slot over the cutout and rotate clockwise a…
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What’s the difference between a snap lock and a Pittsburgh seam? Snap lock is the standard seam on most commercial rectangular duct. Themachine forms a female edge with a turned down lip and a male edge withpunched notches. Push them together and the notches catch. Pittsburgh isfor the pieces that cannot go through the snap…
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As an Amazon Associate I earn from qualifying purchases. What is a high efficiency take-off and when do you use one? A high efficiency take-off is an angled tap that feeds a branch off a trunk line. You will only see one when the spec calls for it — they cost more and take longer…
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The s-cleat slides onto two opposing edges and holds the load from one duct to the other. Drives slide over the other two bent edges and get bent over at the corners to keep the joint tight. They have a push and pull reaction. S-cleats alone do not close a joint. Just starting out? Here…
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Welcome to the Site This site is created to act a resource for HVAC professionals and non professionals. A place to find the tools anyone needs for the next project or to replace a tool that has been more than used. This helpful site is meant to be a liaison to the tool, accessories, toolboxes…