Ductwork repair & replacement in Columbia, SC

Hot upstairs rooms? Weak airflow from some vents? The problem may be in your attic or crawl space. On Call's NATE-certified technicians find and fix leaky, crushed and disconnected ductwork that wastes the air you're paying to heat and cool.

Request a service

For urgent help, call (803) 781-4357.

Signs of a duct problem

  • Rooms that are always hotter or colder than the rest of the house

  • Weak airflow from certain vents

  • Rooms that get worse when the door is closed

  • Comfort problems that started after a remodel or new equipment

In Midlands homes, ductwork usually runs through attics and crawl spaces that get extremely hot or humid, so leaks and missing insulation cost you twice.

What we check

Our technicians inspect accessible ductwork for damaged or disconnected sections, leaks, missing or crushed insulation and blocked supply or return airflow — then connect what they find to the rooms you're having trouble with. Replacing your HVAC system? We'll check whether your ducts can support the new equipment, so you get the comfort you're paying for.

Repair what needs repair

Most duct problems come down to a few damaged or disconnected sections, and a focused repair fixes them. If your layout or ductwork condition is the real issue, your technician will show you why before recommending bigger work — with a firm price either way.

Ducts and equipment work together

A new AC or furnace won't fix ductwork that can't deliver the air. When you're replacing equipment, we plan the ducts and the system together so your home actually feels better.

How we can help

Your technician inspects your ductwork on site and gives you a firm price before any work begins. Our residential diagnostic fee is $89, waived when you go ahead with the repair. Pay by cash, check or card, or ask about financing.

Family-owned since 2011, licensed in South Carolina (Mechanical License CLM.111515 MC) and rated 4.9 stars from 298 Google reviews.

A few common questions.

How do I know if my ducts are the problem?

Not always. Sun exposure, insulation and the equipment itself can all play a part. Our technician checks the ducts, airflow and the room together, then shows you what they found before recommending anything.

Does a hot room need a bigger duct?

No. More often, a leaking, crushed or disconnected duct — or a missing return — is starving the room of air. Fixing that is usually simpler than resizing the ductwork.

Will duct repair lower my energy bills?

Sealing leaks and fixing disconnected ducts keeps the air you pay to cool or heat from escaping into your attic or crawl space. Actual savings depend on your home and how bad the leaks are.

Do you offer duct cleaning?

This page covers duct repair and replacement. Ask our team if you're interested in cleaning and we'll let you know what's available.

On Call branded plumbing, heating and air service van.

When you need us,
one call does it.

Locally owned and operated in Columbia and the Midlands.
Trained technicians, not trained salespeople.