Premium Custom HVAC Duct Fittings - Made to Order
PMX Ductwork fabricates custom sheet metal duct fittings for residential and commercial HVAC systems. Every fitting is precision-cut and formed to your exact specifications using our parametric 3D design engine. Choose from galvanized steel, aluminum, or stainless steel in 26, 24, 22, or 20 gauge.
Materials & Gauges
Galvanized Steel is the industry standard for most residential and commercial HVAC installations. Our galvanized duct fittings resist corrosion and provide decades of reliable service. Aluminum fittings are 65% lighter, ideal for rooftop units and suspended installations. Stainless Steel delivers maximum corrosion resistance for clean rooms, commercial kitchens, and marine environments.
Connection Types
Every fitting is available with your choice of connection type on each end: Raw (plain edge), Slip (friction-fit overlap), Drive (drive cleats), TDC (transverse duct connectors), or Flanged (bolted flanges for high-pressure systems).
Design Your Fitting Online
Use our interactive 3D designer on any fitting page to specify exact dimensions, material, gauge, and connections. See a real-time 3D model, CAD drawing, and instant pricing. Or use voice input to describe your fitting in natural language and let our AI configure it automatically.
Sizes and Prices
Every size we publish a price for is listed on all duct fitting sizes and prices — a size index for each fitting type, with the live price beside every dimension and an order page for each one.
Why PMX Ductwork?
Fabricated in Pennsylvania's Allegheny Mountains since 1997. Every fitting is cut on CNC equipment, formed on precision brakes, and inspected before shipping. We handle single fittings through full commercial jobs. Same-day quoting and fast turnaround on every job.
HVAC Ductwork Resources
Our HVAC ductwork blog covers sizing, installation, and materials in depth. Popular guides: how to size ductwork, rectangular vs. round duct, duct connection types explained, and galvanized vs. aluminum vs. stainless steel.