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Ductwork replacement cost for a whole home usually runs from about $3,500 to $12,000 or more, based on national cost guides. Most projects land between $10 and $30 per linear foot. Home size, where the ducts run and the materials used set the final price. A proper quote for new duct installation service should break every cost out.
Prices in Belmont, Gastonia and the Charlotte area vary with attic heat, tight crawl spaces and older home layouts. Gerald Griffin Heating and Cooling Services has worked on Gaston County duct systems since 2013. We do not guess prices over the phone, but we will inspect your ducts and give you a written quote. Call (980) 277-5122.
Key Takeaways
- Whole-home ductwork replacement often costs $3,500 to $12,000 or more.
- Location matters. Crawl spaces and finished walls cost more than open attics or basements.
- Leaky ducts lose 20 to 30% of the air moving through them.
- Repair or sealing is often enough if the ducts are in decent shape.
- A fair quote lists removal, materials, sealing, insulation and permits separately.
How Much Does Ductwork Replacement Cost?
A 2,000 square foot home usually costs about $3,500 to $7,000 for ductwork replacement, according to common national cost ranges. Flexible duct sits at the low end, and sheet metal at the high end. Hard-to-reach crawl spaces, asbestos or drywall repairs push the price higher.
Cost by Home Size
| Home Size | Typical Range | What Changes the Price |
|---|---|---|
| 1,000 to 1,500 sq ft | $1,500 to $4,500 | Single level, easy attic access |
| 1,500 to 2,000 sq ft | $2,500 to $5,500 | Number of rooms and returns |
| 2,000 to 2,500 sq ft | $3,500 to $7,000 | Material choice and duct location |
| 2,500 to 3,000 sq ft | $4,500 to $8,000 | Two stories or two systems |
| 3,000 sq ft and up | $6,000 to $12,000 or more | Multiple zones and long runs |
These are broad ranges from national cost guides, not a quote. Your home may fall outside them.
Cost by Duct Material
- Flexible duct: the most affordable and quickest to install. It works well in attics when it is run straight and supported.
- Fiberglass duct board: mid-range cost with built-in insulation. It muffles noise but needs care in humid spaces.
- Sheet metal: the most durable and the most expensive. It lasts the longest and resists damage.
What Drives the Price Up or Down
Where Your Ducts Run
Open attics and unfinished basements are the easiest spaces to work in. Crawl spaces are tight and often damp, which adds labor. Ducts inside finished walls and ceilings cost the most, because drywall has to be opened and repaired. ENERGY STAR lists ducts in an attic, crawlspace or garage as a common sign of poor duct performance.
Removal and Hidden Extras
- Tearing out and hauling away old ducts
- New registers, grilles and boots
- Duct insulation, especially in hot attics
- Drywall and paint repairs
- Permits and inspections
Asbestos in Older Homes
Some homes built before the 1980s have asbestos tape or wrap on ducts. Do not disturb it yourself. The EPA says material in good shape can be left alone, but accredited asbestos professionals must handle removal if work will disturb it. This adds cost, so ask about it early.
Signs Your Ductwork Needs Replacing
- Rooms that stay hot or cold no matter the thermostat setting
- Rising energy bills with no change in use
- Crushed, torn, kinked or disconnected ducts in the attic
- Heavy dust around vents soon after cleaning
- Musty smells or visible mold on duct material
- Ducts that are 20 years old or more
Should You Replace 20-Year-Old Ductwork?
Not always. Age alone is not a reason to replace ducts. Many sheet metal systems last much longer. A 20-year-old flex duct system in a hot attic, though, is often brittle, sagging and leaky. Have it inspected. If most runs are damaged, replacement usually beats patching.
Moldy or Wet Fiberglass Ducts
Mold on fiberglass duct material is a replacement job. The EPA notes that it and two industry groups recommend replacing moldy fiberglass duct material, because cleaning cannot stop the mold from growing back.
Repair vs. Seal vs. Replace
| Option | Best When | Relative Cost |
|---|---|---|
| Repair | One or two damaged sections | Low |
| Seal and insulate | Ducts are sound but leaky | Low to moderate |
| Partial replacement | One area is crushed, moldy or poorly designed | Moderate |
| Full replacement | Most runs are old, damaged or sized wrong | High |
If only a few runs are the problem, targeted duct repair work can save thousands.
Is Ductwork Replacement Worth It?
Often, yes. ENERGY STAR estimates that 20 to 30% of the air in a typical duct system is lost to leaks and poor connections. It also says leaky ducts reduce efficiency by as much as 20%. In long Carolina summers, that waste shows up on every bill. A well-sealed system may even let you choose a smaller, less costly HVAC unit that removes humidity better.
Want to know if your ducts are costing you money? Call Gerald Griffin at (980) 277-5122 for a duct inspection.
How to Tell If Your Ductwork Quote Is Fair
- Ask for line items: removal, new materials, labor, sealing, insulation and permits.
- Check the material: flex, duct board or sheet metal, and the insulation R-value.
- Ask about sizing: the contractor should size ducts to your home and system, not just copy the old layout.
- Confirm sealing: joints should be sealed with mastic or approved tape.
- Get the scope in writing: number of supply runs, returns and registers.
- Compare at least two quotes with the same scope.
If the total is a stretch, ask about HVAC financing for homeowners.
Ductwork Replacement Cost FAQs
How much does it cost to replace ductwork in a 2,000 sq ft house?
Replacing ductwork in a 2,000 square foot house usually costs about $3,500 to $7,000, based on common national cost ranges. Flexible duct in an open attic sits at the lower end. Sheet metal, crawl space access, asbestos or drywall work push it higher. Get an in-home quote for an accurate number.
Does HVAC replacement include ductwork?
Usually not. Most HVAC replacement quotes cover the outdoor unit, indoor unit and connections, but ductwork is priced separately. If your ducts are old or leaky, replacing them at the same time can save on labor and helps size the new system correctly.
Does homeowners insurance cover air duct replacement?
Homeowners insurance usually does not cover ductwork that wears out with age. It may cover ducts damaged by a sudden event, like a fire, storm or burst pipe. Every policy is different, so check yours or call your agent before you start work.
Should I clean my air ducts instead of replacing them?
Cleaning will not fix leaks, crushed runs or poor design. The EPA says duct cleaning has never been shown to prevent health problems. If your ducts are sound but dusty, cleaning may help. If they are damaged, moldy fiberglass or badly leaking, repair or replacement is the better use of money.
Get a Clear Ductwork Replacement Quote in Belmont
If you are comparing ductwork replacement cost quotes or wondering if your ducts need work, call Gerald Griffin Heating and Cooling Services at (980) 277-5122. We will inspect your attic or crawl space, show you what we find and give you honest options. We also compare duct upgrades with ductless versus central systems when that makes sense. We serve Belmont, Mount Holly, Gastonia, Cramerton and nearby towns. You can also schedule a duct inspection online.
Gerald Griffin Heating and Cooling Services
902 Belmont Mt Holly Rd, Belmont, NC 28012
Phone: (980) 277-5122
Hours: Open 24 hours
NC Heating Contractor License #32307