Custom HVAC Ductwork Fabrication in NJ — Sheet Metal Shop, Commercial & Residential

Most HVAC contractors subcontract ductwork to a sheet-metal shop. Cold Freeze Technologies has in-house fabrication capability — custom-fit ductwork cut to spec for the actual job, not field-bodged to make standard sizes work. Sheet-metal work is part of the trade Frank came up through. It's not an add-on; it's a core skill.

NJ License #13VH03913000 Insured & Workers' Comp 1–10 Year Warranties

Get a Free Quote (732) 979-4907

AC Duct Work Fabrication — Cold Freeze Technologies NJ

Why ductwork quality matters for HVAC performance

A 4-ton AC system delivering air through improperly sized ductwork operates like a 2.5-ton system. Undersized duct creates velocity noise, pressure drop, and uneven distribution. Leaky duct joints — common on site-cobbled work — dump conditioned air into wall cavities. We fabricate ducts to the actual static pressure and velocity specs the system calls for, not to whatever standard size is on the supplier's shelf.

Custom duct fabrication for commercial and residential HVAC

Rectangular supply and return trunk systems, round spiral duct, flex duct connections, transition pieces, plenums, and specialty shapes for tight installations. Restaurant spaces with low ceilings, commercial spaces with exposed ductwork for aesthetic reasons, old residential homes where runs don't match standard sizes — all fabricated to fit.

Duct replacement and modification for existing HVAC systems

Old galvanized ductwork develops rust-through, seal failures, and section collapses. Duct replacement improves delivered airflow, reduces system noise, and often eliminates the hot/cold spots homeowners complain about for years. We can replace sections or the full system depending on condition. Most NJ commercial duct replacement projects run $3,500–$12,000 depending on scope.

"Most contractors do refrigeration OR HVAC. We do both — plus ductwork fabrication, kitchen exhaust, warehouse ventilation, and industrial-scale cooling. One call, one crew, one licensed contractor who stands behind the work."

— Frank Ferraj, Owner · Cold Freeze Technologies · 40+ years in the trade

Common questions about ac duct work fabrication

Do you fabricate custom HVAC ductwork in NJ?

Yes — in-house sheet-metal fabrication, custom-cut to your job's specs. Not field-modified standard pieces. If your space has unusual dimensions or routing constraints, we build to fit.

How much does duct replacement cost in NJ?

Partial duct replacement (one zone or one trunk): $800–$3,500. Full residential duct replacement: $3,500–$8,000. Commercial duct work varies with scope — call for a site estimate.

Can you replace leaky ductwork in an old house?

Yes — this is common in older NJ homes with original galvanized or 1970s flex duct that was never sealed properly. We assess whether section replacement or full replacement makes more sense. Duct sealing is an option for systems where the duct structure is intact but leaking at joints.

Do you do duct fabrication for commercial kitchens?

Yes — including grease duct (16-gauge welded construction per NFPA 96), supply plenums, and custom transitions for tight kitchen spaces. Commercial kitchen duct has different code requirements than standard HVAC duct — we build to the right standard for each application.