Factors Affecting Ductwork Cost
The cost to replace ductwork is driven by two main factors: the amount of materials needed (which depends on home size) and the complexity of the labor. A typical full replacement costs between $2,000 and $7,000.
Labor costs can vary dramatically based on accessibility. Working in a tight, difficult-to-access crawlspace will cost significantly more than working in an open, unfinished basement. Replacing ducts hidden behind drywall is the most expensive scenario.
When to Consider Replacement
| Symptom | Reason for Replacement |
|---|---|
| Age | Ducts over 15-20 years old may have failing seals, poor insulation, and reduced efficiency. |
| High Energy Bills | Leaky or poorly designed ducts can lose 20-30% of conditioned air, forcing your HVAC system to work much harder. |
| Poor Air Quality | Old ducts can harbor dust, mold, and other allergens that are difficult to remove completely with cleaning. |
| Noise | Ducts that are undersized for a new, more powerful HVAC system can create excessive noise from high air velocity. |
How to Use the Calculator
- Enter the total square footage of your home.
- Select the option that best describes where your ductwork is located and how easy it is for contractors to access.
- Click "Estimate Cost" to see a breakdown of material and labor costs, and a total project cost range.
Frequently Asked Questions
Does this price include a new furnace or AC unit?
No. This calculator is for the ductwork only. A new furnace or air conditioner is a separate, significant expense.
Is it cheaper to repair or replace?
For minor issues like a single disconnected joint or a small leak in an accessible area, repair is much cheaper. If your ducts are old, inefficiently designed, or have widespread leakage, a full replacement is often the more cost-effective solution in the long run due to energy savings.