How to Vent a Clothes Dryer | Ask This Old House

Ask This Old House plumbing and heating expert Richard Trethewey travels to Cleveland to reroute a lengthy dryer vent.
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Time: 1-2 hours

Cost: $30

Skill Level: Beginner

Tools List for Venting a Clothes Dryer:
Measuring tape
Drill Driver
Hole saw slightly larger than size of vent pipes
Metal cutting scissors or shears

Shopping List:
Rigid dryer pipes
Dryer vent elbows
Dryer vent cover
Critter cover
Foil duct tape
Vent clamp

Steps:
1. Measure and mark the correct location for the rigid pipe to vent to the outside.
2. Drill a pilot hole through the marked location to determine where to drill from outside.
3. When drilling through vinyl siding, set the drill into reverse and lightly score the hole based on the center of the pilot hole using the hole saw.
4. Set the drill into the correct direction and drill the hole. Don’t cut all the way through to the other side.
5. Go back inside and drill the rest of the hole from the inside. This will ensure the cut appears clean on both sides of the hole.
6. Measure and cut the rigid vent pipes to size. Seal the seams of the vent pipes with the duct tape.
7. Insert the pipe into the dryer vent cover. Seal the seam with more duct tape.
8. From the outside, insert the pipe into the hole. Secure the vent cover to the exterior wall with screws. You can add an additional critter cover over the dryer vent cover to prevent pests from coming up.
9. Insert the other end of the pipe into a dryer vent elbow and seal it with duct tape.
10. Push the dryer back into position. Connect the dryer vent to the elbow and secure it using a clamp and a screwdriver.
11. Plug the dryer back in.

Resources:
Richard recommends keeping the dryer vents as short as possible to prevent lint from accumulating and clogging the vent. All of the pieces Richard used to install the vent, including the duct tape, the rigid pipe, elbows, and the duct cover are all available at home centers.

About Ask This Old House TV:
Homeowners have a virtual truckload of questions for us on smaller projects, and we’re ready to answer. Ask This Old House solves the steady stream of home improvement problems faced by our viewers—and we make house calls! Ask This Old House features some familiar faces from This Old House, including Kevin O’Connor, general contractor Tom Silva, plumbing and heating expert Richard Trethewey, and landscape contractor Roger Cook.

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How to Vent a Clothes Dryer | Ask This Old House
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View Comments

  • Easy for you. Try replacing the dryer vent that is 3 stories up. Without a 40 foot ladder

  • great video but one where they are drilling through brick would be better

  • how to do you know if there is no electrical or anything in the walls?

  • they should take out the old duct 1st and use that for the new connection

  • wait till all that PVC water lines start leaking all over. that's such a garbage way of doing water pipes. all those joints held by glue. if builders are not going to use copper they should go with the PEX lines.

  • Would a longer run with a couple of bends b ok as long as you have a little down slope. I get the point tho. Usually one bend anyway eh !

  • do yoi have a video on exhaust installation when dryer is in cellar? about 6 feet below ground level.

  • Our idiot builder made our dryer vent go up to the roof instead they could of made go outside! We later made it go straight outside and our clothes get dry very fast now

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