Their accordion-like ridges also trap lint, which creates a fire hazard. To make matters worse, these dryer vent lines go up in flames quickly if a lint …
PDI
May 2, 2012 · Dust and air pollutants collect in the vents and then are picked up by.
Oval vent pipe is a normal option for gas appliances. It is designed to fit in a stud bay which is only 3.5” deep. So no, it’s not a construction defect.