Proper dryer venting is much more important than most homeowners realize.
Considering the stakes involved and the frequency of residential dryer fires, the topic of dryer venting deserves more attention than it gets.
A quick look behind just about any dryer can be illuminating.
In most cases, the flexible duct (transition hose) is going to have multiple bends. In situations that can be very dangerous, the exhaust hose can be crushed against the wall.
Add lost socks, an empty fabric softener box and a considerable accumulation of lint dust and this very real fire hazard becomes obvious.
All this is before looking inside the wall or at the exhaust system’s outside termination.
Inside the wall, long duct runs with many elbows increase the rate of lint accumulation in the duct and in the dryer itself.
Inefficient dryer vent terminations that are all too common also contribute to the problem.
While we strongly recommend that the lint screen be cleaned before every load, the fact is that lint still makes it past the filter.
There are many reasons lint builds up in every dryer system. Some you can see. Some you can’t.