DIY Network

How to Replace Outdated Dryer Venting

Follow these instructions to replace outdated dryer venting and eliminate a potential fire hazard.

More in Windows Walls and Doors

replace outdated dryer venting
  • Time


  • Price Range

    $100 - $250

  • Difficulty

    Moderate to Hard


Step 1: Expose the Duct

Cut through the drywall to expose the old duct work and remove the old flex duct (Image 1). Now you can install the new aluminum flex duct. Begin by connecting the new flex duct to the old one in the ceiling (Image 2) and sealing them together with aluminum tape (Image 3).

Step 2: Add Reinforcement

Secure the duct every few feet with metal straps and screws between the studs.

secure duct with metal straps between studs

Step 3: Install the Access Panel

Near the floor, create a 90-degree angle in the duct and install a metal access panel around it. This is where it will connect to the dryer. Once all the connections are made, re-install the drywall with tape and joint compound.

install metal access panel around duct

Step 4: Install a New Exterior Vent

For a finishing touch, install a new exterior dryer vent. Remove the old vent, and install the new vent according to the manufacturer's instructions.

install new exterior dryer vent