Lint removal and venting faults

Dryer Vent Cleaning in Greater Burlington, Vermont

A dryer vent is the other duct in a house that accumulates a combustible deposit and vents to the outside, so chimney technicians clean them. Lint packs along the run, and it packs fastest where the duct is long, where it has elbows, and where flexible foil or plastic ducting has been used instead of rigid metal. The consequences arrive in order: the dryer takes longer to dry a load, then it runs hot, then the appliance's own safety cutout starts tripping, and at the end of that sequence is a duct fire. Cleaning covers the full run from the appliance to the exterior termination, not just the section you can reach behind the machine. The termination matters as much as the duct: a flap held shut by lint, or blocked by a bird's nest, defeats a perfectly clean run.

Scope

What a dryer vent cleaning visit can cover

  • Cleaning the full duct run from appliance to exterior termination
  • Rotary brushing for long runs and runs with elbows
  • Cleaning the exterior hood, flap and any screen
  • Pulling the appliance to reach the transition duct behind it
  • Checking the transition duct material and replacing foil or plastic
  • Checking duct material and connections along the accessible run
  • Airflow check at the termination after cleaning
  • Noting any venting fault the cleaning cannot fix
When to call

Reasons people book dryer vent cleaning

  • Clothes taking two cycles to dry when they used to take one
  • The dryer or the laundry room getting noticeably hot
  • A burning or hot-lint smell when the dryer runs
  • The dryer shutting itself off part-way through a cycle
  • Lint visible around the exterior vent hood or on the outside wall
  • An exterior flap that no longer opens or closes
  • A long duct run, or one you know is flexible foil
  • No record of the vent ever having been cleaned
A dryer duct running from the appliance through two elbows to an exterior hood, with the three places lint concentrates marked: the crushed transition duct behind the appliance, the inside of each elbow, and the exterior flap.DryerHood12231 Transition ductCrushed behind the appliance2 Every elbowEach counts as a length penalty3 The flapHeld open by lint, or screened
Lint concentrates at the transition, at every elbow, and at the termination flap.
The process

What happens in dryer vent cleaning, in order

  1. Tell us where the dryer is, about how long the duct run is, and where it exits the building.
  2. We clean the whole run instead of the accessible end. The exterior termination gets cleared too.
  3. Airflow is checked at the outlet afterwards so the improvement is measured, not assumed.
  4. Anything that is a venting fault instead of a lint problem is identified with what it would take to correct.
Pricing factors

What changes the quote for dryer vent cleaning?

Prices come from the independent company that visits your property, because the work is quoted and carried out by that company. These are the variables that move the number, so you can read a quote correctly and compare two of them.

How chimney quotes are built, and what makes two comparable →
  • Length of the duct run and how many elbows it has
  • Where the dryer sits: a basement run to a gable is not a through-wall run
  • Whether the appliance has to be pulled and reconnected
  • Whether the transition duct is being replaced
  • Accessibility of the exterior termination and its height
  • How much accumulation there is, and whether it is compacted
  • Whether a bird nest or animal blockage has to be dealt with
  • Multi-unit buildings with shared or extended runs

Dryer venting: what is correct and what is not

Most dryer vent problems are installation problems that have been quietly getting worse. The duct material and the termination cause the majority of them.

ElementCorrectCommonly foundWhy it matters
Duct materialRigid smooth-wall metalFlexible foil or plasticRidges and sags catch lint; plastic is combustible
Transition at the applianceListed transition duct, as short as possibleLong crushed foil behind the machineCrushed duct restricts airflow immediately
Run lengthWithin the appliance's stated equivalent lengthLong runs with several elbowsEach elbow counts as a substantial length penalty
TerminationExterior hood with a flap that opens under airflowScreened vent, or a flap held open by lintA screen blocks with lint almost immediately
Where it endsOutside the building, alwaysAttic, crawl space or garageDischarges moisture and lint into the structure
JointsTaped, with the male end pointing downstreamScrews through the ductScrews project inside and collect lint
Timing

When dryer vent cleaning is ordinarily booked

Year round

What can be done in which season in Vermont →
Questions about dryer vent cleaning

Common questions about questions about dryer vent cleaning

How often should a dryer vent be cleaned?+

Once a year is the usual guidance for a normal household. Larger households, long duct runs and anyone drying heavy or high-lint loads should expect to need it more often. The dryer will commonly tell you first by taking longer to finish a load.

Is a dryer vent really a fire risk?+

Yes. Lint is highly combustible, and the failure sequence is well documented: restricted airflow, elevated temperature, overheating appliance, ignition. One of the more preventable causes of household fires and it is prevented by keeping the duct clear.

Can I not just clean the lint trap?+

The lint trap catches a share of it and the rest goes into the duct. A clean trap and a packed duct is the normal situation in a house that has never had the run cleaned, which is exactly why the appliance can seem fine while the duct is not.

What is wrong with flexible foil ducting?+

Its ridged interior catches lint, it crushes easily behind an appliance, and it sags between supports so lint settles at the low points. Rigid smooth-wall metal duct is what the run should be, with a listed transition at the appliance.

How long can a dryer duct be?+

Manufacturers specify a maximum equivalent length. Each elbow counts as a substantial fraction of it. Long runs and multiple bends are exactly the installations that need cleaning most often. Where a run exceeds what the appliance allows, the correction is a venting change.

Can a dryer vent into an attic or a crawl space?+

No. It must terminate outside. Venting a dryer into an enclosed space discharges moisture and lint into the building, which causes damp, mould and a lint accumulation in a place nobody looks at.

Why do you clean dryer vents if you are a chimney company?+

Because it is the same problem, the same tools and the same access. A duct that accumulates a combustible deposit and vents combustion-adjacent heat to the outside is a chimney technician's work, and the rotary equipment used on a flue is what cleans a long duct run correctly.

Does a gas dryer make this more serious?+

It adds carbon monoxide to the list, since a gas dryer's combustion products go out through the same duct. A blocked vent on a gas dryer is both a fire risk and a combustion-products risk, so it is treated with more urgency.

There is a bird nest in my dryer vent. What now?+

It gets removed and the termination gets a proper hood with a flap that closes. Nesting in a dryer vent is common precisely because the vent is warm, and a missing or broken flap is what let it happen.

How do I know it worked?+

Airflow at the exterior termination, checked after the work, is the direct measure. The everyday one is that a normal load dries in one cycle again. If it does not, the problem was not only lint and the venting itself needs looking at.

Can you clean the vent in a condo or apartment building?+

Often, though shared and extended runs in multi-unit buildings sometimes involve building management, and some runs are far longer than a single-family equivalent. Tell us the building type when you ask so the right approach is planned.

Should the exterior hood have a screen?+

No, and if yours does it should come off. A screen at a dryer termination collects lint immediately and blocks the run. What the termination needs is a hood with a flap that opens under airflow and closes when the dryer stops.

My dryer is new and it still dries slowly.+

That points strongly at the duct, not the appliance. A new dryer is connected to the same run as the old one, and a restricted duct produces exactly the symptom people buy a new dryer to solve.

Can I clean it myself?+

The transition duct behind the machine and the exterior hood are reasonable to do yourself. A long run with elbows, or a termination on a second storey, is where the rotary equipment and the access make the difference between clearing it and moving it along.