Recently my wife had complained that our clothes dryer located in the basement wasn't drying like it use to so she would run it a second cycle. I went down and found it was on "air dry" only so I changed it to heat and thought I had solved the problem. Well yesterday she reported the same problem was occurring so I went outside to see if the vent was open and letting out hot moist air. NOPE not one bit!
Making this a shorter story now...today I have replaced the outside vent/door plus 6 feet of flexible all aluminum 4" vent pipe and 2 elbows, plus reamed out 8 feet of vertical rigid vent pipe that is hidden behind drywall. I was aghast at the clogs of compacted link in those pipes! Guess we were blessed that our home hasn't burnt down, huh?
I don't mean to scare anyone but I had enclosed all this 26 years ago when I finished the laundry room. Being just the two of us we only run like 4 loads every month. Just saying that "iffin" you run many more loads and have any similar set up through the walls and closed ceiling space (which I failed to tell about) you MIGHT want to think about my warning here.
L, M, S, Mini