How Much Does Ductwork Cost in Denver?
Ductwork services in Denver range from $200 – $5,000+ depending on the scope. Duct sealing runs $200-$800. Full ductwork replacement for an average home costs $2,000-$5,000.
Ductwork Cost by Service Type
The right ductwork service depends on whether your ducts need sealing, repair, modification, or full replacement:
| Service | Cost Range | When It's Needed |
|---|---|---|
| Duct sealing (mastic/tape) | $200 – $800 | Leaky joints causing uneven temps or high bills |
| Duct insulation | $300 – $1,000 | Ducts in unconditioned spaces (attic, crawl) |
| Duct repair (section) ★ | $300 – $1,200 | Damaged, disconnected, or crushed sections |
| Duct modification/extension | $500 – $2,000 | Adding runs to new rooms or remodels |
| Full ductwork replacement | $2,000 – $5,000 | Entire system is old, undersized, or failing |
| Ductwork for new construction | $3,000 – $7,000+ | New home or major renovation |
Signs Your Ductwork Needs Attention
Some rooms hot, others cold — indicates leaks or blockages in the duct runs.
Leaky ducts waste 20-30% of heating/cooling. Sealing often pays for itself in one season.
Low airflow from registers means crushed, kinked, or disconnected ducts.
Popping, rattling, or whistling sounds indicate pressure problems or loose connections.
Ductwork at Colorado Altitude
At 5,000+ feet, air is less dense. HVAC blowers need to move more air volume to deliver the same heating and cooling capacity. This means ductwork sizing is more critical in Colorado than at sea level — undersized ducts create pressure problems that reduce system efficiency and comfort.
Colorado's dry climate also means static electricity builds up more easily in duct systems, and our temperature swings (60°F days to 20°F nights) cause duct joints to expand and contract, loosening connections over time. Regular inspection catches these issues early.
What's Included
Measure leakage before and after
Mastic and metal tape, not duct tape
R-8 insulation on exposed runs
All work meets local building code
Verify airflow after duct work
Upfront pricing on all duct services
Frequently Asked Questions
How much does duct sealing cost?
Duct sealing in Denver runs $200-$800 and typically pays for itself within one heating/cooling season through lower energy bills. Leaky ducts waste 20-30% of your HVAC output.
How do I know if my ductwork needs repair?
Signs include uneven room temperatures, excessive dust, higher energy bills, weak airflow from registers, and noisy operation. A professional duct inspection can identify leaks and damage.
Can bad ductwork affect my AC?
Absolutely. Leaky or undersized ducts are one of the top reasons AC systems underperform. Fixing the ductwork often solves comfort problems without needing a new AC unit.
How long does ductwork replacement take?
Full ductwork replacement for an average home takes 2-3 days. Duct sealing and minor repairs are typically completed in half a day.
Does On Time Heat & Air do duct cleaning?
We focus on duct repair, sealing, and replacement rather than duct cleaning. If your ducts are leaking or damaged, cleaning won't fix the underlying problem.