Lint is the most flammable thing in the house
Dryer lint ignites more readily than paper, and thousands of house fires a year begin in a dryer duct. The mechanism is simple: lint accumulates, airflow drops, the appliance runs hotter and longer to compensate, and eventually heat meets fuel.
The lint trap catches a portion of it. The rest goes into the duct, which is the part that matters and the part nobody sees.
Why Atlanta houses make it worse
A great deal of housing in this metro puts the laundry upstairs or in an interior closet rather than against an outside wall. It is convenient and it means a long duct run with several bends before the air reaches a vent hood.
Every bend is a collection point. A long, bent run also raises back pressure, so the appliance is fighting the duct on every cycle even when it is clean. Add the lint and it compounds.
Roof-terminated runs are the extreme case: vertical, long, and topped with a hood that homeowners have no way of checking.
The symptoms people misread
Clothes still damp after a full cycle is the classic sign, and it is almost always read as the dryer failing rather than the duct blocking. So is a laundry room that gets unusually hot, and a cycle that has quietly got longer over a couple of years.
The one that should prompt an immediate call is a burning or scorched smell during a cycle. That is not a symptom to schedule around.
What a proper clean involves
The duct is brushed through its full length with extraction at the appliance end — not blown through from one side, which relocates lint rather than removing it. The transition hose behind the machine gets checked, because crushed foil hose is one of the commonest faults we find.
Airflow should be measured at the hood before and after, so the improvement is a number rather than an assurance. And if the installation itself is the problem — a run far too long for the appliance, or one terminating in a crawlspace rather than outdoors — that should be reported rather than cleaned around.
Want a professional to take a look?
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Frequently Asked Questions
Annually for a typical household. More often with a large family, heavy bedding and towel loads, or a long duct run. If the laundry is upstairs, treat annual as the minimum.
More than most. Vertical roof-terminated runs collect lint at every bend and at the hood, and they are the runs a homeowner can least easily check.