Product review (5 stars): warms the basement on laundry day in the winter
Easy install. Laundry is in unheated basement and dryer venting is behind and routed up to just above ground level. I liked that it nearly instantly made the otherwise unheated room less chilly to restart a load of laundry and tidy up. The day I installed it the outside temperature was about 30 degrees F.
The moisture is a plus to combat dry winter air.
Also keeps some of the cold winter air from dropping back into the basement through the venting.