How to Dispose of Ductwork: Metal, Flex Duct, and Wrap

How to dispose of ductwork depends on the material. Galvanized sheet metal duct, the most common kind in older homes, is scrap metal and can go to a transfer station metal pile or scrap yard. Flexible duct, with its plastic jacket and fiberglass insulation, goes in the trash or with construction debris. Duct board, a rigid fiberglass panel, goes in general debris. Before removing old duct, check for asbestos in tape, wrap, or joint compound.

Types of duct and where they go

Asbestos in older duct

Homes built before about 1980 may have asbestos in duct wrap, the white paper tape at joints, or the cement around boots and plenums. Do not tear or cut it. Have it tested, and if positive, use a licensed abatement contractor. See where to dump asbestos.

Removing duct

1. Turn off the furnace or air handler before cutting into duct.
2. Wear gloves and eye protection; sheet metal edges are sharp.
3. Remove screws and tape at joints.
4. Flatten rectangular duct by opening the seam with a screwdriver or snips to save space.
5. Bag fiberglass insulation to contain fibers.

Scrap metal value

Galvanized steel is low value per pound, but duct is light, so you will not get much. The benefit is that most transfer stations take metal free or cheaply, which beats paying general waste rates. Separate any aluminum or copper. See separating metal before it is buried.

Large remodels

When replacing a whole system, the HVAC contractor typically removes old duct as part of the job. For DIY basement finishing, a construction debris load can include flex duct, duct board, and drywall together. See how to dispose of construction debris.

Dirt and dust

Old duct holds years of dust, which can include mold or pest debris. Wear a respirator rated for fine particles and bag dusty sections before carrying them through the house.

How to dispose of ductwork FAQ

Is HVAC ductwork recyclable?

Sheet metal duct is recyclable as scrap metal. Flex duct and duct board usually are not.

Can old ductwork contain asbestos?

Yes, in some pre-1980 homes, especially in wrap, tape, or joint cement. Test before removing.

How do I flatten metal ductwork?

Open the seam with a screwdriver or snips and press it flat. Wear gloves.

Can flexible duct go in the trash?

Usually, yes, or with construction debris. Bag the insulation to contain fibers.

Do scrap yards pay for ductwork?

Very little, but many sites take it free or cheap in the metal pile.

The bottom line

How to dispose of ductwork: scrap sheet metal and aluminum duct, put flex duct and duct board with trash or construction debris, and test older wrap and tape for asbestos before removal. Flatten duct to save space and wear protection against sharp edges and dust. Use the map to find a site near you that takes scrap metal and debris.