Ductwork replacement cost in Dallas-Fort Worth ranges from $3,000 for targeted repairs on a small home to $12,000+ for a full duct system replacement on a two-story property. Most DFW homes built before 2000 have undersized, poorly sealed, or deteriorating ductwork that dramatically reduces HVAC efficiency - often more than the HVAC unit itself.
DFW Ductwork Costs by Scope
| Scope | DFW Cost Range | Best For |
|---|---|---|
| Duct sealing (Aeroseal) | $1,500 - $3,500 | Leaky existing ducts in accessible attics |
| Partial duct replacement (1-2 zones) | $2,000 - $5,000 | Failed flex duct sections, accessible runs |
| Full duct replacement (single story) | $4,000 - $8,000 | Complete system replacement, older fiberglass board ducts |
| Full duct replacement (two story) | $7,000 - $12,000 | Two-system homes, complex routing |
| Duct re-routing + insulation upgrade | $5,000 - $10,000 | Improving poorly designed systems |
Signs Your DFW Home Needs Ductwork Replacement
- →Hot and cold rooms: If certain rooms never get comfortable regardless of thermostat setting, the ductwork serving those rooms is likely undersized, disconnected, or leaking.
- →High energy bills: Duct leakage rates of 25-40% are common in older DFW homes. You are paying to condition your attic, not your living space.
- →Visible damage: Flex duct in DFW attics degrades quickly in extreme heat. If you can see collapsed, kinked, or disconnected sections, those sections need replacement.
- →System age: Fiberglass duct board (common in DFW homes built 1970-1995) has a 20-25 year lifespan. After that, the interior lining degrades and sheds particles.
- →New HVAC on old ducts: Installing a new high-efficiency unit on a leaky duct system wastes the investment - the ducts limit what the equipment can deliver.
Ductwork and DFW Attic Conditions
DFW attics reach 140-160°F in summer. Flex duct installed in unconditioned attic space loses significant efficiency even when properly sealed - the duct surface temperature drives up the supply air temperature before it reaches living areas. Some DFW homeowners choose to move ductwork inside the conditioned envelope (within insulation rather than outside it) to dramatically improve efficiency. This is a significant project ($8,000-$20,000) but can cut HVAC runtime by 15-25%.
Zencore Homes handles complete HVAC and ductwork replacement across DFW - properly sized, sealed, and permitted.
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