Product review (5 stars): Hopefully fixes dryer safety switch failure.
A dryer overheat safety switch kept going out (about once a year) on our dryer.  Third time replacing the switch.  The vent pipe was cleaned about every 6 months, so there was no blockage.  I just think the dryer does not have a powerful enough blower in it.  It appears the 20 feet of strait dryer vent was too long, so added this booster fan to see if that fixes the issue.  Too early to tell.  Fan works as planned with the current switch that is included.  I put the current switch in a 4X4 electric box.