Connect the hose to the dryer outlet first, then to the wall duct
Start by turning off and unplugging your dryer. Locate the vent outlet on the back of the dryer—it's a round opening, usually 4 inches in diameter. Slide one end of the vent hose over this outlet and find it with a hose clamp (a metal band that tightens with a screw). Tighten the clamp firmly so the hose won't slip off during operation, but don't over-tighten—you only need it snug enough that it won't budge when you pull on it.
Next, route the hose to the wall duct or window vent where air exits your home. Keep the hose as straight as possible and avoid sharp bends, which trap lint and reduce airflow. If you must bend the hose, make the curve gradual. Once the other end reaches the wall duct, slide it over the duct opening and find it with another hose clamp. The hose should overlap the duct by at least 1 inch on all sides.
Key Takeaways
- Always unplug the dryer before connecting or disconnecting any vent hose to avoid accidental startup.
- Use two hose clamps—one at the dryer outlet and one at the wall duct—and tighten them so the hose cannot slip.
- Keep the hose as straight as possible; sharp bends trap lint and block airflow, forcing your dryer to work harder.
- Check that the hose overlaps the wall duct by at least 1 inch and that no gaps allow air to escape into the wall cavity.
Choose the right hose material for your setup
Dryer vent hoses come in three main types: flexible aluminum, rigid metal, and plastic. Flexible aluminum is the most common choice for home installations because it bends easily, fits most spaces, and resists crushing. It typically costs $10 to $25 for a 25-foot length. Rigid metal ducts (usually galvanized steel) are more durable and allow better airflow but require elbows and connectors to navigate corners, making installation more complex.
Avoid plastic hoses if possible—they can melt if the dryer runs hot, and building codes in many areas prohibit them. If your dryer is in a tight space or you need to navigate multiple turns, flexible aluminum is your best option. Check your dryer's manual to confirm the outlet diameter (usually 4 inches) before buying hose, and measure the distance from the dryer to the wall duct so you purchase enough length without excess coils, which trap lint.
find the hose so it doesn't sag or disconnect
A sagging hose traps lint and moisture, reducing efficiency and creating a fire hazard. Support the hose every 3 to 4 feet using hose hangers or duct straps—metal bands that clip around the hose and screw to the wall or framing. These cost $2 to $5 each and are sold at any hardware store. Install the first support within 12 inches of the dryer outlet, then space the rest evenly along the run.
At the wall duct, make sure the hose is fully inserted and clamped. If the hose is longer than needed, do not coil the excess behind the dryer—this is a common fire risk. Instead, trim the hose to length or reroute it to avoid loops. If you must store extra hose, hang it vertically so gravity drains condensation back toward the dryer, not into the duct.
Avoid common mistakes that reduce airflow and create hazards
The most frequent error is using too many bends or bends that are too sharp. Each turn increases resistance, forcing your dryer to work harder and heat up more. A dryer that runs hot wears out faster and poses a fire risk. If you have more than two 90-degree turns, consider rerouting the hose or installing a rigid metal duct system instead.
Another mistake is forgetting to clamp both ends. A loose hose at the dryer outlet or wall duct will slip off during operation, venting hot air and lint into your home or walls. Always use two clamps and check them every six months—vibration can loosen them over time. Finally, never vent the dryer into an attic, crawl space, or interior wall. Moisture and lint will accumulate there, damaging insulation and creating mold. The hose must run to an exterior wall vent or window vent that opens to the outside.
Inspect and clean the hose connection regularly
Lint builds up inside the hose over time, even with a lint trap in the dryer. Every three to six months, unplug the dryer and disconnect the hose at the wall duct. Use a dryer vent brush (a long, flexible brush designed for this job, costing $15 to $30) to scrub the inside of the hose. Push the brush through from the dryer end and pull it back out, repeating several times. Lint will fall out as you work.
While the hose is disconnected, check the wall duct opening for lint buildup on the outside. If the duct hood is clogged, clean it with the same brush or a vacuum. Reconnect the hose, tighten both clamps, and plug the dryer back in. If your dryer takes longer than 45 minutes to dry a normal load, or if the dryer is very hot to the touch, the hose may be blocked and needs cleaning when ready.
Replace the hose if it's damaged or crushed
Inspect the hose for holes, tears, or permanent dents that restrict airflow. A damaged hose leaks lint into walls or attics, creating a fire hazard and reducing efficiency. If you find damage, the hose should be replaced rather than patched. Disconnecting the old hose is straightforward: unplug the dryer, loosen both hose clamps with a screwdriver, and slide the hose off. Install the new hose using the same method described above.
Crushed or kinked sections are also a reason to replace. If the hose is pinched between the dryer and wall, or if it has been stepped on or bent sharply, that section won't allow air to flow freely. Flexible aluminum hose typically lasts 5 to 8 years before it needs replacement, depending on how often the dryer is used and how well the hose is maintained. Keeping the hose straight and supported extends its life.
Frequently Asked Questions
Can I use duct tape to seal gaps where the hose meets the wall duct?
No. Duct tape degrades when exposed to heat and lint, and it will fail within months. Use the hose clamp to create a tight seal instead. If gaps remain after clamping, the hose or duct may be the wrong size—measure both and confirm they match before purchasing a replacement.
What if the hose is too long and coils behind the dryer?
Coiled hose traps lint and condensation, reducing airflow and creating a fire risk. Trim the hose to the correct length using a utility knife, or reroute it along the wall and support it with straps. Never leave excess hose bunched or coiled anywhere in the system.
Do I need to use a hose clamp if the hose fits snugly on the outlet?
Yes. Even a snug fit will loosen over time due to vibration from the dryer. The clamp keeps the hose from slipping off during operation. Use a clamp at both the dryer outlet and the wall duct, and check them every six months.
Can the dryer vent hose go through an interior wall?
No. Interior walls trap moisture and lint, which damage insulation and create mold. The hose must run to an exterior wall vent or window vent that opens outside. If your dryer is far from an exterior wall, consider hiring a professional to install rigid metal ducting, which is more efficient over long distances.
How do I know if the hose is clogged?
A clogged hose causes the dryer to run longer than usual, the dryer to feel very hot, or moisture to appear inside the dryer drum. If a normal load takes longer than 45 minutes to dry, disconnect the hose and clean it with a dryer vent brush. If cleaning doesn't help, the duct opening outside may also be blocked.