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Air Duct Sealing Cost: Detailed Guide to Average Pricing & Savings

The cost of air duct sealing is an important consideration for homeowners. According to ENERGY STAR, 20% to 30% of the air moving through residential ductwork can be lost due to holes and poor connections. This means your HVAC system has to work harder to maintain comfortable temperatures, leading to higher energy consumption. Proper duct sealing can prevent air leakage, making your AC and heating units more efficient.

Air Duct Sealing Cost Overview

As of 2024, the cost of duct sealing ranges from $500 to $4,000, with the average being around $2,250. This process involves inspecting the HVAC ducts that run behind walls, above ceilings, and under floors—areas that are often hidden but can deteriorate over time. The effects of worn-out ducts are noticeable in decreased comfort and higher energy bills.

Sealing your ducts can resolve these issues and provide long-term cost benefits. However, it’s not an inexpensive service. Here’s a breakdown of factors that can influence the overall cost of duct sealing:

Home Size

The larger your home, the more ductwork is required, which can increase costs. On average, duct sealing costs about $1 per square foot, but this can vary based on system layout and other factors. Here’s a general guide:

  • 1,000 Square Feet: $500 to $1,500
  • 1,500 Square Feet: $750 to $2,250
  • 2,000 Square Feet: $1,000 to $3,000
  • 2,500 Square Feet: $1,250 to $3,750
  • 3,000 Square Feet: $1,500 to $4,500
Air Duct Sealing Cost

Sealing Method

Ducts can be sealed manually with metal tape, which is labor-intensive and averages around $2,250. Alternatively, the Aeroseal process involves spraying a sealant inside the ducts, which is less labor-intensive and typically costs around $1,300.

The location of your ducts can affect the cost. Sealing ducts in accessible areas like attics, basements, or crawlspaces is generally less expensive than those behind walls or under floors.

Inspection

An HVAC duct inspection costs around $150 on average, but a thorough inspection before using Aeroseal can cost up to $300. An inspection helps identify leaks and assess the overall condition of your ductwork.

Pressure Testing

After sealing, a pressure test may be performed to ensure all leaks are sealed. This test typically costs between $200 and $450.

Extent of Damage

Larger gaps in your ductwork will cost more to repair than smaller leaks. Simple leaks may cost as little as $50 to seal, but more complex repairs in less accessible areas can be more expensive.

Air Duct Sealing Cost

How to Save on Duct Sealing

You may be eligible for energy efficiency rebates from your state, municipality, or utility company, which can help offset the cost of duct sealing. Scheduling an inspection can save you money by identifying minor leaks early, and a pressure test after sealing ensures you’re getting the most out of your investment. You might also save on duct cleaning if the technician is already working on your system.

Our licensed and insured technicians at Prime Genius Heating, Air & Appliances are trusted throughout Sacramento and beyond to seal, clean, and maintain air ducts. Duct leaks can reduce HVAC efficiency, increase utility bills, and cause unwanted noise. We use advanced sealing methods to address these issues, ensuring your heating and cooling system runs smoothly. To schedule duct sealing, call us at (916) 800-4007.

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