Metal Fabrication for HVAC & Mechanical Contractors
Spiral duct, rectangular SMACNA duct, custom fittings, and complete ductwork packages — fabricated in-house by MPI Fabrication for HVAC and mechanical contractors across the Southeast.
Your Single-Source Duct Shop
Mechanical contractors get squeezed by job-site changes, late equipment cuts, and submittal revisions. MPI is built to absorb that. We're a one-stop ductwork shop running spiral, SMACNA rectangular, transitions, plenums, return drops, and the custom fittings your installers can't get from a catalog.
Every part is sealed, labeled, and staged to your install sequence. Standard turnaround is 24–72 hours; larger custom packages are scheduled around your field calendar.
- Spiral duct — round geometry for cleaner airflow, finished architectural look
- SMACNA-standard rectangular duct in all gauges and pressure classes
- Custom transitions, plenums, return drops, end caps, taps
- Sealed and labeled to your install sequence
Submittal-Friendly Workflow
Send your duct schedule, equipment cuts, or marked-up drawings. Our team reviews specs, flags concerns, confirms gauge and joint type, and confirms scope before fabrication starts.
If you're chasing a Friday inspection, tell us. We sequence around your schedule, not ours.
- Pre-fabrication submittal review and field-condition flagging
- Per-floor or per-zone staging available
- Color-coded part labeling for fast field IDs
- Field-emergency runs on 24-hour turnaround when possible
Beyond Duct — Mechanical Metal Scope
MPI also fabricates the supporting metal scope that mechanical contractors hate sourcing — pipe penetration boots, equipment curbs, custom housings, exterior weather hoods, and access doors.
- Custom equipment curbs and rooftop housings
- Pipe penetration flashings and weather hoods
- Stainless sanitary duct for healthcare and food-service work
- Custom acoustic and thermal liner integration
Frequently Asked Questions
Answers to what contractors most often ask before partnering with MPI Fabrication.
Does MPI fabricate to SMACNA standards on rectangular duct?
Yes. All MPI rectangular ductwork meets or exceeds SMACNA HVAC Duct Construction Standards for the pressure class and gauge your project requires.
What pressure classes does MPI fabricate?
MPI fabricates duct in Low (½"–2" wg), Medium (3"–6" wg), and High (10" wg) pressure classes. Specify the class on your submittal package and we confirm gauge and joint type accordingly.
Can MPI handle a full-floor duct package on a single order?
Yes. We routinely fabricate full-floor and multi-floor duct packages with per-zone labeling and staged delivery synced to your install crew's pace.
Do you provide insulation, liner, or do we field-install?
We can integrate internal liner during fabrication when specified. External wrap is typically field-installed; we'll coordinate either way.
Need a Fabrication Quote?
Upload drawings or specs and our team will price your project within 24 business hours.