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CostHelper > Home and Garden  > Electrical, HVAC & Energy Efficiency > Ductwork

Ductwork Cost


How Much Does Ductwork Cost?

 
low costDIY Installation: $100-$2,000+average costProfessional Duct Replacement: $1,000-$5,000+high costAdding New Ducts: $5,000-$15,000+
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Ductwork is a branching network of tubes in the walls, floors and ceilings. It takes air from throughout the house and delivers it to the heater/air conditioner, where the air is heated or cooled, then delivers the heated or cooled air back into the living space. Both intake and output of air is important to a balanced, climate-controlled system. To operate efficiently, ducts must be sized to match the heater and air conditioner, and designed so the correct amount of air reaches each room.

Typical costs:

  • Replacing aging, leaking or inadequate ductwork typically costs about $35-$55 a linear foot for labor and materials, or $1,000-$5,000 or more for a single-family home, depending on the length and type of ducts used (sheet metal, fiberduct or round flexible ductwork) and local rates. (The linear footage of ductwork varies widely depending on the type of heating and cooling system, when and how it was installed and the layout and construction of the house.) Factors affecting the cost include whether the home is one- or two-story; the total number of intake and output vents needed to create comfortable temperatures in the house; the number of separate temperature-control zones; the extent of repairs needed to floors, walls and ceilings after the ducts are installed; and accessibility -- whether new ducts can be easily run through an attic or crawlspace, or if there are places where there is no room for new ductwork and the old ducts snake in and around trusses.
  • If the home's layout makes installation particularly challenging, replacing existing ductwork or adding it to a house that never had ducts can cost $5,000-$15,000 or more. In some cases adding ductwork can be cost-prohibitive, and homeowners may instead choose to use a ductless air conditioner ($2,000-$5,000, installed) and/or a ductless mini-split heat pump ($4,500-$6,000, installed).
  • Do-it-yourself installation is possible, particularly when installing or replacing ductwork to a specific area, like a basement or a new addition. Follow all local building codes and make sure all connections and seams are properly sealed, with no leakage. DIY materials can cost $100-$2,000 or more, depending on the type of materials and total length. For example, DIYNetwork[1] estimates it takes a weekend and $100-$250 to replace a section of ductwork with flexible ducting and install a return vent, rating the project difficulty at moderate to hard. And a Virginia homeowner[2] reports spending $450 for DIY installation of modern ductwork in a basement (the least expensive bid for professional installation was $2,500).
Related articles: Ductless Air Conditioner, Air Heat Pump, Central Air Conditioner, Central Heating

What should be included:
  • Poorly designed or inadequately installed ductwork can decrease the efficiency of the heating or cooling system by as much as 40%. HGTV Pro explains duct system design and installation. The U.S. Department of Energy provides an overview of the best practices[3] for installing duct systems in new and retrofit homes.
  • A video by DIY retailer Ductworks.net explains installation procedures[4] for sheet metal, fiberduct and flexible ducting, noting that the gas and electrical connections should be installed by a licensed professional.
Additional costs:
  • Check with the local building or planning department; a permit is typically required. (Most air conditioning contractors will be aware of permit requirements and will obtain the proper paperwork). For residential projects, permit fees are usually nominal ($10-$100), but can cost more depending on location and the size of the project.
Shopping for ductwork:
  • Get recommendations for concrete resurfacing contractors from family, friends, or the staff at local home improvement or hardware stores. Or search for local companies through the Air Conditioning Contractors of America[5] .
  • Ask for and contact references; verify that the company is properly licensed[6] , bonded and insured; search for complaints filed with the Better Business Bureau[7] . A written contract should include a detailed outline of the work required and materials to be used, and dates within which the project will be done.
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What People Are Paying - Recent Comments
3 zones, replacing all ducts in attic
Amount: $24,000.00
Posted by: Mr Freeze in Novato, CA.Posted: January 27th, 2017 04:01PM
Length of Ducts: 2200 sq ft home
Old home with 4" ducts buried in cement in floor. Some crushed.
Adding 3 zone 2 stage hvac, all new duct work in attic / ceiling.
Bid seems crazy high but all competing bids have been similar.
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a/c duct repair
Amount: $5,915.00
Posted by: Dr. Stan Malkin in Itvine, CA.Posted: October 6th, 2016 03:10PM
Length of Ducts: ?
Paid above price for two bedroom condo upstairs and office,dining room downstairs (approximately 1400 sq ft. Had three levels of installations to choose from. Chose middle level.
0range County, CA
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repl all old ductwork in 3bdrm 2 ba 1900sf home
Amount: $2,900.00
Posted by: Woodie in Las Vegas, NV.Posted: September 21st, 2016 04:09PM
Installer: contractorType of Ducts: flex
This was the lowest bid using new flex R8 ducts and installing an extra 4 supply ducts/vents to expand coverage. New RAG cover also. 16 supply vents total.
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duct replacement and zoning
Amount: $4,900.00
Posted by: Jonb in raleigh, NC.Posted: September 21st, 2016 10:09AM
Installer: Type of Ducts: flex and hard duct
Length of Ducts: 200
two zones and replacement of all ductwork in crawlspace and attic. actually made more efficient run of duct on replacement than previous design.
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$2,100 for new ducts on 1,200 sq. ft home
Amount: $2,100.00
Posted by: Cv1113 in Anaheim, CA.Posted: August 8th, 2016 09:08AM
Installer: Sun SolarType of Ducts: R8
Length of Ducts: 9 ducts
Recently bought an older home that had ducts insulated with asbestos. It's running $550 to remove the old ducts and $2,100 to replace with new R8 insulated ducts. They're running 9 ducts, with volume dampers.
I wanted to try myself but would likely be overwhelmed and mess something up in the process.
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New ductwork and plenum
Amount: $3,225.00
Posted by: Christi in New Orleans, LA.Posted: August 5th, 2016 04:08AM
Length of Ducts: ?
All new ductwork and plenum replacing original metal ducts in 42 year old house is $3225
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Duckwork
Amount: $3,009.00
Posted by: Lfdykes in Chicago, IL.Posted: August 31st, 2015 03:08AM
Single family home
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air duct replacement
Amount: $4,500.00
Posted by: pr in bakersfield, CA.Posted: August 10th, 2015 08:08PM
Length of Ducts: 14 air ducts in attic
I was told my current ducts are an r4 rating & not cooling my house properly. I was quoted 4500.00 I don't know if the price is fair or on the higher end?
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replace ductwork in 2br (1200 sq ft) condo
Amount: $3,600.00
Posted by: condo-owner in Naples, FL.Posted: April 28th, 2015 08:04AM
Installer: Penguin AirType of Ducts: Flex
"New Flex duct complete installation (9) drops with supply Plenum" I'm hoping this is a reasonable price to replace ducts and sanitize my air conditioning blower. They're replacing original 1970's ducts which apparently have bacterial growth and also holes leaking cool air into the attic.
April 2015
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HVAC + ductwork...new build
Amount: $16,800.00
Posted by: jordyn in hudson, OH.Posted: January 14th, 2015 08:01AM
Length of Ducts: 5000 sq. ft. home
This is my lowest bid. I have been told that its okay but that I should be able to get a better price. This was using 2 zones...one 60,000 btu and one using 120,000 but.
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External Resources:
  1.  www.diynetwork.com/how-to/how-to-replace-ductwork-and-install-a-return-vent/index.html
  2.  www.epinions.com/msg/show_~threads/cat_id_~17/id_~2216/forum_id_~404
  3.  apps1.eere.energy.gov/buildings/publications/pdfs/building_america/ns/b21_duct_systems.pdf
  4.  www.youtube.com/watch?v=nZv8nOIsNAs
  5.  www.acca.org/consumer/find-a-contractor/
  6.  www.contractors-license.org/
  7.  www.bbb.org/us/Find-Business-Reviews/
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