Why exactly is plastic venting a fire hazard? I think we should define
our terms. Plastic venting can burn during a fire, but it won't cause
a fire by spontaneously combusting; temps in venting just aren't that
hot. A combustion source would have to come from the dryer itself. So
here's the truth: poor venting arrangements can make lint back up in
the dryer, and if there is so much lint that it combusts near the
element, then the fire could travel to the venting. However, I would
like to know just how often this really happens. Every time I read
about a dryer fire, I never here that the the fire travelled through
the venting too. So, it is time to put the urban legends away, and
spend some time with reality. Having a better venting application
simply allows the dryer to do its thing, which is to get rid of lint.
On the other hand, some dryer designs are notoriously poor lint
handlers, and will collect lint even under some of the best venting
applications. That is because they are poorly designed. Does anyone
know which ones they are?