
A COMPLETE ORDER MEANS NO RECUTTING ON SITE
You have the measurements. What else does the order need?
A fitting can match every size on your sketch and still arrive with the wrong bend or the wrong joint. These guides cover the choices that go on the order with the sizes, and which ductwork you can price online.
Get the details right before the order, not on site.

Start Here With How to Specify a Duct Fitting Once You Have the Measurements →
Two fittings with the same sizes can still be built very differently. The guide walks through the elbow shape, the joint at each end, transitions, takeoffs, pressure class, sealing, and what goes inside, with a checklist to send with your order.
Most packages raise four more questions before they're ordered. Will a stock fitting do, can it be priced online, what gauge and pressure class does it need, and should it be lined?

A stock fitting is quicker to get when it fits the run. Learn the signs that a run needs a fitting made to its own sizes instead.

Standard sizes and fittings can be priced and ordered online with a company account. See which items price instantly and which ones need a quote.

The pressure class on the drawings sets how thick the metal is and how it's stiffened. Learn where to find the pressure class, and what to do when it's missing.

Lining cuts noise but takes up some of the space inside. Learn what to tell us about the type and thickness, and when double-wall duct suits the job better.

Got an order ready? Send the drawing or your sketch and we'll check what's missing before anything gets cut. Standard ductwork and fittings price instantly on WebDuct once your company has an account.
Still taking the sizes? Field Measure, Fit and Installation walks through measuring a run, while Choosing Materials and Finishes helps you pick the metal. Every other decision before an order lives in the Spec Room.