A trunk line is the main horizontal duct that carries conditioned air from the air handler to branch takeoffs throughout the building. A plenum is the transition box that connects the air handler's outlet collar directly to the trunk line — it's typically taller and wider to match the unit's outlet, then transitions down to the trunk dimension. Both are fabricated to order at Duct2Go in standard and custom sizes.

Yes — custom sizes are our core capability. If you need a specific width, height, or length not in our standard catalog, submit your dimensions through the custom quote form. We fabricate virtually any rectangular duct configuration from measurements, field sketches, or formal shop drawings.

Standard rectangular duct is fabricated in 26-gauge galvanized steel for most residential and light commercial sizes. Larger commercial trunk lines and industrial applications are built to heavier gauges (24 or 22 gauge) per SMACNA requirements. Specify your gauge requirement in your order or custom quote if your project specs call for something specific.

Yes. We fabricate supply and return plenum boxes to your air handler's outlet dimensions. Plenums are available in galvanized steel, aluminum, and stainless steel. Standard configurations ship in 5 business days; custom-sized plenums are typically completed in 1–2 weeks. Upload your AHU specs or a dimensional sketch through the custom quote form.

Rectangular duct ships flat-packed or nested to minimize freight volume and damage risk. Larger orders are palletized and shipped via LTL freight carrier from our Chandler, AZ facility. Tracking is provided from our shop to your delivery address. Both residential delivery and commercial jobsite drop-off are available