How Much Does Air Duct Replacement Cost in Denver? [2025 Data]

When it’s time to upgrade your ductwork, you can expect to spend $588 on air duct replacement in Denver, CO. Most air duct replacement projects will range from $278 to $912, depending on factors like your home’s square footage and the type of ductwork you have. Denver homeowners rely on reliable HVAC and ductwork to deliver cool air in the hot summers and warm air during the long, harsh winters, so an efficient system is a must-have.

Air Duct Replacement Cost Factors 

When it turns out that you don’t just have dirty air ducts but old, leaking ductwork that needs to be replaced, there are several cost factors to consider. From the size of your home to the type of ductwork you need, here are some factors that influence the cost of installing new air ducts in Denver, CO. 

Size

The size of your home directly affects air duct replacement costs. Larger homes require more materials and labor to replace the entire duct system. On average, the cost ranges from $2,000 to $5,000 for a small- to medium-sized home. However, duct replacement can run as low as $1,400 for smaller homes and as high as $9,000 for larger homes. Here’s how the size of your home affects duct replacement costs:

Duct Location

If only specific sections of your ductwork need replacement, such as in a renovation project, costs will depend on the location of the damaged or worn ductwork. Replacing ducts in hard-to-reach or concealed areas—like attics, basements, ceilings, walls, or crawl spaces—can increase labor costs. Here’s how the location of the ducts could affect their cost:

Duct Material

The material you choose for your replacement ducts affects both their cost and longevity. The most commonly used duct material in Denver, CO, is sheet metal made from galvanized steel.

Sheet metal ducts are durable but pricey. Flexible ducts, on the other hand, are more affordable but may need to be repaired or replaced sooner. Here’s a breakdown of air duct replacement costs based on duct material:

HVAC Pro Costs

Hiring an HVAC pro for air duct replacement makes up 60% of the project total, or about $50 to $110 per hour. Many jobs take five to seven hours to complete, although hard-to-reach air ducts will take longer to replace.

While some DIY projects can save you money on home repairs, it’s always best to leave air duct replacement to the pros. Not only can mistakes lead to costly leaks and quicker repair needs, but DIYing could also void your home insurance policy coverage and your HVAC warranty.

Permits

Your HVAC pro will include the cost of permits in the project total and can handle the application process for you. Building permits from the City of Denver depend on project value. 

• Projects up to $500 have a $20 permit fee.

• Projects from $501 to $2,000 have a $35 permit fee. 

• Projects of $2,001 to $25,000 have a $35 fee for the first $2,000 in project value, plus $8 for each additional (or fraction of) $1,000, in addition to a plan review fee of 50% of the permit fee.

Let an HVAC repair pro in Denver, CO, handle the air duct replacement so you can kick back and enjoy your more efficient heating and cooling system. 

Additional Pros to Consider Hiring

During and after the air duct replacement, you may also need to pay for mold or asbestos testing and removal, insulation installation, and drywall repair. Here are the average costs of these projects for Denver homeowners:

• Drywall repair cost: $275–$760

• Mold remediation cost: $1,110–$3,120

• Asbestos testing cost: $200–$380

• Insulation installation cost: $870–$1,980

Does Air Duct Replacement Increase Home Value?

Living in a city with hot summers and long, cold winters, Denver homebuyers prioritize new, reliable HVAC and duct systems. Whether you clean or replace your ducts, efficient ductwork and an HVAC system that is in good condition can make your home more attractive to potential buyers. Even if you’re not selling, new ductwork ensures your HVAC runs smoothly and keeps your energy bills in check. 

How Angi Gets Its Cost Data

Home is the most important place on earth, which is why Angi has helped more than 150 million homeowners transform their houses into homes they adore. To help homeowners with their next project, Angi provides readers with the most accurate cost data and upholds strict editorial standards. We survey real Angi customers about their project costs to develop the pricing data you see, so you can make the best decisions for you and your home. We pair this data with research from reputable sources, including the U.S. Bureau of Labor Statistics, academic journals, market studies, and interviews with industry experts—all to ensure our prices reflect real-world projects. 

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